Merge mozilla-central to mozilla-autoland. r=merge a=merge CLOSED TREE

2024-11-29 15:52:07 +00:00 · 2017-11-24 00:36:16 +02:00 · 2017-11-24 00:36:16 +02:00 · 7d49983b86
commit 7d49983b86
parent 438ca97ce7 da0a72a9d7
332 changed files with 16662 additions and 10972 deletions
--- a/.cron.yml
+++ b/.cron.yml
@ -98,6 +98,18 @@ jobs:
              mozilla-central: [{hour: 10, minute: 0}]
              # No default

+    - name: searchfox-index
+      job:
+          type: decision-task
+          treeherder-symbol: Searchfox
+          target-tasks-method: searchfox_index
+      run-on-projects:
+          - mozilla-central
+      when:
+          by-project:
+              mozilla-central: [{hour: 10, minute: 30}]
+              # No default
+
    - name: periodic-update
      job:
          type: decision-task
--- a/browser/base/content/browser-pageActions.js
+++ b/browser/base/content/browser-pageActions.js
@ -20,7 +20,7 @@ var BrowserPageActions = {
  },

  /**
-   * The photonmultiview node in the main page action panel (DOM node)
+   * The panelmultiview node in the main page action panel (DOM node)
   */
  get multiViewNode() {
    delete this.multiViewNode;
@ -234,7 +234,7 @@ var BrowserPageActions = {
    let iframeNode = null;

    if (action.subview) {
-      let multiViewNode = document.createElement("photonpanelmultiview");
+      let multiViewNode = document.createElement("panelmultiview");
      panelViewNode = this._makePanelViewNodeForAction(action, true);
      multiViewNode.appendChild(panelViewNode);
      panelNode.appendChild(multiViewNode);
--- a/browser/base/content/browser.css
+++ b/browser/base/content/browser.css
@ -71,32 +71,17 @@ panelmultiview {
  -moz-binding: url("chrome://browser/content/customizableui/panelUI.xml#panelmultiview");
 }

-photonpanelmultiview {
-  -moz-binding: url("chrome://browser/content/customizableui/panelUI.xml#photonpanelmultiview");
-}
-
 panelview {
  -moz-binding: url("chrome://browser/content/customizableui/panelUI.xml#panelview");
  -moz-box-orient: vertical;
 }

 panel[hidden] panelmultiview,
-panel[hidden] photonpanelmultiview,
 panel[hidden] panelview {
  -moz-binding: none;
 }

-.panel-mainview {
-  transition: transform var(--panelui-subview-transition-duration);
-}
-
-panelview:not([mainview]):not([current]):not([in-transition]) {
-  transition: visibility 0s linear var(--panelui-subview-transition-duration);
-  visibility: collapse;
-}
-
-photonpanelmultiview panelview:not([current]):not([in-transition]) {
-  transition: none;
+panelview:not([current]):not([in-transition]) {
  visibility: collapse;
 }

@ -1070,12 +1055,6 @@ notification[value="translation"] {
  -moz-binding: url("chrome://browser/content/translation-infobar.xml#translationbar");
 }

-/** See bug 872317 for why the following rule is necessary. */
-
-#downloads-button {
-  -moz-binding: url("chrome://browser/content/downloads/download.xml#download-toolbarbutton");
-}
-
 /*** Visibility of downloads indicator controls ***/

 /* Bug 924050: If we've loaded the indicator, for now we hide it in the menu panel,
--- a/browser/base/content/browser.xul
+++ b/browser/base/content/browser.xul
@ -417,15 +417,15 @@
           emailLink-title="&emailPageCmd.label;"
           sendToDevice-title="&pageAction.sendTabToDevice.label;"
           sendToDevice-notReadyTitle="&sendToDevice.syncNotReady.label;">
-      <photonpanelmultiview id="pageActionPanelMultiView"
-                            mainViewId="pageActionPanelMainView"
-                            viewCacheId="appMenu-viewCache">
+      <panelmultiview id="pageActionPanelMultiView"
+                      mainViewId="pageActionPanelMainView"
+                      viewCacheId="appMenu-viewCache">
        <panelview id="pageActionPanelMainView"
                   context="pageActionContextMenu"
                   class="PanelUI-subView">
          <vbox class="panel-subview-body"/>
        </panelview>
-      </photonpanelmultiview>
+      </panelmultiview>
    </panel>
    <panel id="pageActionFeedback"
           role="alert"
--- a/browser/components/controlcenter/content/panel.inc.xul
+++ b/browser/components/controlcenter/content/panel.inc.xul
@ -16,8 +16,8 @@
    <broadcaster id="identity-popup-insecure-login-forms-learn-more" class="text-link plain" value="&identity.learnMore;"/>
  </broadcasterset>

-  <photonpanelmultiview id="identity-popup-multiView"
-                        mainViewId="identity-popup-mainView">
+  <panelmultiview id="identity-popup-multiView"
+                  mainViewId="identity-popup-mainView">
    <panelview id="identity-popup-mainView"
               descriptionheightworkaround="true">
      <!-- Security Section -->
@ -184,5 +184,5 @@
      </vbox>

    </panelview>
-  </photonpanelmultiview>
+  </panelmultiview>
 </panel>
--- a/browser/components/customizableui/CustomizableUI.jsm
+++ b/browser/components/customizableui/CustomizableUI.jsm
@ -1620,7 +1620,7 @@ var CustomizableUIInternal = {
      if (areaType != CustomizableUI.TYPE_MENU_PANEL) {
        let wrapper = this.wrapWidget(aWidget.id).forWindow(ownerWindow);

-        let hasMultiView = !!aNode.closest("photonpanelmultiview,panelmultiview");
+        let hasMultiView = !!aNode.closest("panelmultiview");
        if (wrapper && !hasMultiView && wrapper.anchor) {
          this.hidePanelForNode(aNode);
          anchor = wrapper.anchor;
@ -1804,13 +1804,9 @@ var CustomizableUIInternal = {

    if (closemenu == "single") {
      let panel = this._getPanelForNode(target);
-      let multiview = panel.querySelector("photonpanelmultiview,panelmultiview");
+      let multiview = panel.querySelector("panelmultiview");
      if (multiview.showingSubView) {
-        if (multiview.instance.panelViews) {
-          multiview.goBack();
-        } else {
-          multiview.showMainView();
-        }
+        multiview.goBack();
        return;
      }
    }
@ -4303,15 +4299,10 @@ OverflowableToolbar.prototype = {
    return new Promise(resolve => {
      let doc = this._panel.ownerDocument;
      this._panel.hidden = false;
-      let photonView = this._panel.querySelector("photonpanelmultiview");
-      let contextMenu;
-      if (photonView) {
-        let mainViewId = photonView.getAttribute("mainViewId");
-        let mainView = doc.getElementById(mainViewId);
-        contextMenu = doc.getElementById(mainView.getAttribute("context"));
-      } else {
-        contextMenu = doc.getElementById(this._panel.getAttribute("context"));
-      }
+      let multiview = this._panel.querySelector("panelmultiview");
+      let mainViewId = multiview.getAttribute("mainViewId");
+      let mainView = doc.getElementById(mainViewId);
+      let contextMenu = doc.getElementById(mainView.getAttribute("context"));
      gELS.addSystemEventListener(contextMenu, "command", this, true);
      let anchor = doc.getAnonymousElementByAttribute(this._chevron, "class", "toolbarbutton-icon");
      // Ensure we update the gEditUIVisible flag when opening the popup, in
--- a/browser/components/customizableui/PanelMultiView.jsm
+++ b/browser/components/customizableui/PanelMultiView.jsm
@ -166,7 +166,7 @@ this.PanelMultiView = class {
  }

  get showingSubView() {
-    return this.node.getAttribute("viewtype") == "subview";
+    return this._showingSubView;
  }
  get _mainViewId() {
    return this.node.getAttribute("mainViewId");
@ -201,11 +201,6 @@ this.PanelMultiView = class {
  }

  get panelViews() {
-    // If there's a dedicated subViews container, we're not in the right binding
-    // to use SlidingPanelViews.
-    if (this._subViews)
-      return null;
-
    if (this._panelViews)
      return this._panelViews;

@ -234,14 +229,10 @@ this.PanelMultiView = class {
    return this._viewShowing || this._currentSubView;
  }
  get _currentSubView() {
-    return this.panelViews ? this.panelViews.currentView : this.__currentSubView;
+    return this.panelViews.currentView;
  }
  set _currentSubView(panel) {
-    if (this.panelViews)
-      this.panelViews.currentView = panel;
-    else
-      this.__currentSubView = panel;
-    return panel;
+    this.panelViews.currentView = panel;
  }
  /**
   * @return {Promise} showSubView() returns a promise, which is kept here for
@ -268,20 +259,14 @@ this.PanelMultiView = class {
    if (testMode)
      return;

-    this._currentSubView = this._anchorElement = this._subViewObserver = null;
+    this._currentSubView = this._subViewObserver = null;
    this._mainViewHeight = 0;
-    this.__transitioning = this._ignoreMutations = false;
+    this.__transitioning = this._ignoreMutations = this._showingSubView = false;

    const {document, window} = this;

-    this._clickCapturer =
-      document.getAnonymousElementByAttribute(this.node, "anonid", "clickCapturer");
    this._viewContainer =
      document.getAnonymousElementByAttribute(this.node, "anonid", "viewContainer");
-    this._mainViewContainer =
-      document.getAnonymousElementByAttribute(this.node, "anonid", "mainViewContainer");
-    this._subViews =
-      document.getAnonymousElementByAttribute(this.node, "anonid", "subViews");
    this._viewStack =
      document.getAnonymousElementByAttribute(this.node, "anonid", "viewStack");
    this._offscreenViewStack =
@ -296,24 +281,14 @@ this.PanelMultiView = class {
    this._panel.addEventListener("popuppositioned", this);
    this._panel.addEventListener("popuphidden", this);
    this._panel.addEventListener("popupshown", this);
-    if (this.panelViews) {
-      let cs = window.getComputedStyle(document.documentElement);
-      // Set CSS-determined attributes now to prevent a layout flush when we do
-      // it when transitioning between panels.
-      this._dir = cs.direction;
-      this.setMainView(this.panelViews.currentView);
-      this.showMainView();
-    } else {
-      this._clickCapturer.addEventListener("click", this);
+    let cs = window.getComputedStyle(document.documentElement);
+    // Set CSS-determined attributes now to prevent a layout flush when we do
+    // it when transitioning between panels.
+    this._dir = cs.direction;
+    this.setMainView(this.panelViews.currentView);
+    this.showMainView();

-      this._mainViewContainer.setAttribute("panelid", this._panel.id);
-
-      if (this._mainView) {
-        this.setMainView(this._mainView);
-      }
-    }
-
-    this.node.setAttribute("viewtype", "main");
+    this._showingSubView = false;

    // Proxy these public properties and methods, as used elsewhere by various
    // parts of the browser, to this instance.
@ -354,24 +329,17 @@ this.PanelMultiView = class {
        this._panelViewCache.appendChild(mainView);
      mainView.removeAttribute("mainview");
    }
-    if (this._subViews)
-      this._moveOutKids(this._subViews);

-    if (this.panelViews) {
-      this._moveOutKids(this._viewStack);
-      this.panelViews.clear();
-    } else {
-      this._clickCapturer.removeEventListener("click", this);
-    }
+    this._moveOutKids(this._viewStack);
+    this.panelViews.clear();
    this._panel.removeEventListener("mousemove", this);
    this._panel.removeEventListener("popupshowing", this);
    this._panel.removeEventListener("popuppositioned", this);
    this._panel.removeEventListener("popupshown", this);
    this._panel.removeEventListener("popuphidden", this);
    this.window.removeEventListener("keydown", this);
-    this.node = this._clickCapturer = this._viewContainer = this._mainViewContainer =
-      this._subViews = this._viewStack = this.__dwu = this._panelViewCache =
-        this._transitionDetails = null;
+    this.node = this._viewContainer = this._viewStack = this.__dwu =
+      this._panelViewCache = this._transitionDetails = null;
  }

  /**
@ -395,13 +363,9 @@ this.PanelMultiView = class {
  }

  _placeSubView(viewNode) {
-    if (this.panelViews) {
-      this._viewStack.appendChild(viewNode);
-      if (!this.panelViews.includes(viewNode))
-        this.panelViews.push(viewNode);
-    } else {
-      this._subViews.appendChild(viewNode);
-    }
+    this._viewStack.appendChild(viewNode);
+    if (!this.panelViews.includes(viewNode))
+      this.panelViews.push(viewNode);
  }

  goBack(target) {
@ -425,20 +389,15 @@ this.PanelMultiView = class {
      return;

    if (this._mainView) {
-      if (!this.panelViews)
-        this._subViews.appendChild(this._mainView);
      this._mainView.removeAttribute("mainview");
    }
    this._mainViewId = aNewMainView.id;
    aNewMainView.setAttribute("mainview", "true");
-    if (this.panelViews) {
-      // If the new main view is not yet in the zeroth position, make sure it's
-      // inserted there.
-      if (aNewMainView.parentNode != this._viewStack && this._viewStack.firstChild != aNewMainView) {
-        this._viewStack.insertBefore(aNewMainView, this._viewStack.firstChild);
-      }
-    } else {
-      this._mainViewContainer.appendChild(aNewMainView);
+    // If the new main view is not yet in the zeroth position, make sure it's
+    // inserted there.
+    if (aNewMainView.parentNode != this._viewStack &&
+        this._viewStack.firstChild != aNewMainView) {
+      this._viewStack.insertBefore(aNewMainView, this._viewStack.firstChild);
    }
  }

@ -446,21 +405,7 @@ this.PanelMultiView = class {
    if (!this._mainViewId)
      return Promise.resolve();

-    if (this.panelViews)
-      return this.showSubView(this._mainView);
-
-    if (this.showingSubView) {
-      let viewNode = this._currentSubView;
-      this._dispatchViewEvent(viewNode, "ViewHiding");
-      this._transitionHeight(() => {
-        viewNode.removeAttribute("current");
-        this._currentSubView = null;
-        this.node.setAttribute("viewtype", "main");
-      });
-    }
-
-    this._shiftMainView();
-    return Promise.resolve();
+    return this.showSubView(this._mainView);
  }

  /**
@ -491,7 +436,7 @@ this.PanelMultiView = class {
      this.descriptionHeightWorkaround(theOne);
      this._dispatchViewEvent(theOne, "ViewShown");
    }
-    this.node.setAttribute("viewtype", (theOne.id == this._mainViewId) ? "main" : "subview");
+    this._showingSubView = theOne.id != this._mainViewId;
  }

  showSubView(aViewId, aAnchor, aPreviousView) {
@ -517,26 +462,21 @@ this.PanelMultiView = class {
      let playTransition = (!!previousViewNode && !showingSameView && this._panel.state == "open");
      let isMainView = viewNode.id == this._mainViewId;

-      let dwu, previousRect;
-      if (playTransition || this.panelViews) {
-        dwu = this._dwu;
-        previousRect = previousViewNode.__lastKnownBoundingRect =
+      let dwu = this._dwu;
+      let previousRect = previousViewNode.__lastKnownBoundingRect =
          dwu.getBoundsWithoutFlushing(previousViewNode);
-        if (this.panelViews) {
-          // Cache the measures that have the same caching lifetime as the width
-          // or height of the main view, i.e. whilst the panel is shown and/ or
-          // visible.
-          if (!this._mainViewWidth) {
-            this._mainViewWidth = previousRect.width;
-            let top = dwu.getBoundsWithoutFlushing(previousViewNode.firstChild || previousViewNode).top;
-            let bottom = dwu.getBoundsWithoutFlushing(previousViewNode.lastChild || previousViewNode).bottom;
-            this._viewVerticalPadding = previousRect.height - (bottom - top);
-          }
-          if (!this._mainViewHeight) {
-            this._mainViewHeight = previousRect.height;
-            this._viewContainer.style.minHeight = this._mainViewHeight + "px";
-          }
-        }
+      // Cache the measures that have the same caching lifetime as the width
+      // or height of the main view, i.e. whilst the panel is shown and/ or
+      // visible.
+      if (!this._mainViewWidth) {
+        this._mainViewWidth = previousRect.width;
+        let top = dwu.getBoundsWithoutFlushing(previousViewNode.firstChild || previousViewNode).top;
+        let bottom = dwu.getBoundsWithoutFlushing(previousViewNode.lastChild || previousViewNode).bottom;
+        this._viewVerticalPadding = previousRect.height - (bottom - top);
+      }
+      if (!this._mainViewHeight) {
+        this._mainViewHeight = previousRect.height;
+        this._viewContainer.style.minHeight = this._mainViewHeight + "px";
      }

      this._viewShowing = viewNode;
@ -549,12 +489,12 @@ this.PanelMultiView = class {
        viewNode.removeAttribute("mainview");

      // Make sure that new panels always have a title set.
-      if (this.panelViews && aAnchor) {
+      if (aAnchor) {
        if (!viewNode.hasAttribute("title"))
          viewNode.setAttribute("title", aAnchor.getAttribute("label"));
        viewNode.classList.add("PanelUI-subView");
      }
-      if (this.panelViews && !isMainView && this._mainViewWidth)
+      if (!isMainView && this._mainViewWidth)
        viewNode.style.maxWidth = viewNode.style.minWidth = this._mainViewWidth + "px";

      if (!showingSameView || !viewNode.hasAttribute("current")) {
@ -584,31 +524,14 @@ this.PanelMultiView = class {
        }
      }

-      // Now we have to transition the panel.
-      if (this.panelViews) {
-        // If we've got an older transition still running, make sure to clean it up.
-        await this._cleanupTransitionPhase();
-        if (playTransition) {
-          await this._transitionViews(previousViewNode, viewNode, reverse, previousRect, aAnchor);
-          this._updateKeyboardFocus(viewNode);
-        } else {
-          this.hideAllViewsExcept(viewNode);
-        }
+      // Now we have to transition the panel. If we've got an older transition
+      // still running, make sure to clean it up.
+      await this._cleanupTransitionPhase();
+      if (playTransition) {
+        await this._transitionViews(previousViewNode, viewNode, reverse, previousRect, aAnchor);
+        this._updateKeyboardFocus(viewNode);
      } else {
-        this._currentSubView = viewNode;
-        this._transitionHeight(() => {
-          viewNode.setAttribute("current", true);
-          if (viewNode.id == this._mainViewId) {
-            this.node.setAttribute("viewtype", "main");
-          } else {
-            this.node.setAttribute("viewtype", "subview");
-          }
-          // Now that the subview is visible, we can check the height of the
-          // description elements it contains.
-          this.descriptionHeightWorkaround(viewNode);
-          this._dispatchViewEvent(viewNode, "ViewShown");
-        });
-        this._shiftMainView(aAnchor);
+        this.hideAllViewsExcept(viewNode);
      }
    })().catch(e => Cu.reportError(e));
    return this._currentShowPromise;
@ -901,123 +824,12 @@ this.PanelMultiView = class {
    return maxHeight;
  }

-  /**
-   * Applies the height transition for which <panelmultiview> is designed.
-   *
-   * The height transition involves two elements, the viewContainer and its only
-   * immediate child the viewStack. In order for this to work correctly, the
-   * viewContainer must have "overflow: hidden;" and the two elements must have
-   * no margins or padding. This means that the height of the viewStack is never
-   * limited by the viewContainer, but when the height of the container is not
-   * constrained it matches the height of the viewStack.
-   *
-   * @param changeFn
-   *        This synchronous function is called to make the DOM changes
-   *        that will result in a new height of the viewStack.
-   */
-  _transitionHeight(changeFn) {
-    if (this._panel.state != "open") {
-      changeFn();
-      return;
-    }
-
-    // Lock the dimensions of the window that hosts the popup panel. This
-    // in turn constrains the height of the viewContainer.
-    let rect = this._panel.popupBoxObject.getOuterScreenRect();
-    this._panel.setAttribute("width", rect.width);
-    this._panel.setAttribute("height", rect.height);
-
-    // Read the current height of the viewStack. If we are in the middle
-    // of a transition, this is the actual height of the element at this
-    // point in time.
-    let oldHeight = this._dwu.getBoundsWithoutFlushing(this._viewStack).height;
-
-    // Make the necessary DOM changes, and remove the "height" property of the
-    // viewStack to ensure that we read its final value even if we are in the
-    // middle of a transition. To avoid flickering, we have to prevent the panel
-    // from being painted in this temporary state, which requires a synchronous
-    // layout when reading the new height.
-    this._viewStack.style.removeProperty("height");
-    changeFn();
-    let newHeight = this._viewStack.getBoundingClientRect().height;
-
-    // Now we can allow the popup panel to resize again. This must occur
-    // in the same tick as the code below, but we can do this before
-    // setting the starting height in case the transition is not needed.
-    this._panel.removeAttribute("width");
-    this._panel.removeAttribute("height");
-
-    if (oldHeight != newHeight) {
-      // Height transitions can only occur between two numeric values, and
-      // cannot start if the height is not set. In case a transition is
-      // needed, we have to set the height to the old value, then force a
-      // synchronous layout so the panel won't resize unexpectedly.
-      this._viewStack.style.height = oldHeight + "px";
-      this._viewStack.getBoundingClientRect().height;
-
-      // We can now set the new height to start the transition, but
-      // before doing that we set up a listener to reset the height to
-      // "auto" at the end, so that DOM changes made after the
-      // transition ends are still reflected by the height of the panel.
-      let onTransitionEnd = event => {
-        if (event.target != this._viewStack) {
-          return;
-        }
-        this._viewStack.removeEventListener("transitionend", onTransitionEnd);
-        this._viewStack.style.removeProperty("height");
-      };
-      this._viewStack.addEventListener("transitionend", onTransitionEnd);
-      this._viewStack.style.height = newHeight + "px";
-    }
-  }
-
-  _shiftMainView(aAnchor) {
-    if (aAnchor) {
-      // We need to find the edge of the anchor, relative to the main panel.
-      // Then we need to add half the width of the anchor. This is the target
-      // that we need to transition to.
-      let anchorRect = aAnchor.getBoundingClientRect();
-      let mainViewRect = this._mainViewContainer.getBoundingClientRect();
-      let center = aAnchor.clientWidth / 2;
-      let direction = aAnchor.ownerGlobal.getComputedStyle(aAnchor).direction;
-      let edge;
-      if (direction == "ltr") {
-        edge = anchorRect.left - mainViewRect.left;
-      } else {
-        edge = mainViewRect.right - anchorRect.right;
-      }
-
-      // If the anchor is an element on the far end of the mainView we
-      // don't want to shift the mainView too far, we would reveal empty
-      // space otherwise.
-      let cstyle = this.window.getComputedStyle(this.document.documentElement);
-      let exitSubViewGutterWidth =
-        cstyle.getPropertyValue("--panel-ui-exit-subview-gutter-width");
-      let maxShift = mainViewRect.width - parseInt(exitSubViewGutterWidth);
-      let target = Math.min(maxShift, edge + center);
-
-      let neg = direction == "ltr" ? "-" : "";
-      this._mainViewContainer.style.transform = `translateX(${neg}${target}px)`;
-      aAnchor.setAttribute("panel-multiview-anchor", true);
-    } else {
-      this._mainViewContainer.style.transform = "";
-      if (this.anchorElement)
-        this.anchorElement.removeAttribute("panel-multiview-anchor");
-    }
-    this.anchorElement = aAnchor;
-  }
-
  handleEvent(aEvent) {
    if (aEvent.type.startsWith("popup") && aEvent.target != this._panel) {
      // Shouldn't act on e.g. context menus being shown from within the panel.
      return;
    }
    switch (aEvent.type) {
-      case "click":
-        if (aEvent.originalTarget == this._clickCapturer) {
-          this.showMainView();
-        }
-        break;
      case "keydown":
        this._keyNavigation(aEvent);
        break;
@ -1060,27 +872,25 @@ this.PanelMultiView = class {
        this._transitioning = false;
        this.node.removeAttribute("panelopen");
        this.showMainView();
-        if (this.panelViews) {
-          for (let panelView of this._viewStack.children) {
-            if (panelView.nodeName != "children") {
-              panelView.__lastKnownBoundingRect = null;
-              panelView.style.removeProperty("min-width");
-              panelView.style.removeProperty("max-width");
-            }
+        for (let panelView of this._viewStack.children) {
+          if (panelView.nodeName != "children") {
+            panelView.__lastKnownBoundingRect = null;
+            panelView.style.removeProperty("min-width");
+            panelView.style.removeProperty("max-width");
          }
-          this.window.removeEventListener("keydown", this);
-          this._panel.removeEventListener("mousemove", this);
-          this._resetKeyNavigation();
-
-          // Clear the main view size caches. The dimensions could be different
-          // when the popup is opened again, e.g. through touch mode sizing.
-          this._mainViewHeight = 0;
-          this._mainViewWidth = 0;
-          this._viewContainer.style.removeProperty("min-height");
-          this._viewStack.style.removeProperty("max-height");
-          this._viewContainer.style.removeProperty("min-width");
-          this._viewContainer.style.removeProperty("max-width");
        }
+        this.window.removeEventListener("keydown", this);
+        this._panel.removeEventListener("mousemove", this);
+        this._resetKeyNavigation();
+
+        // Clear the main view size caches. The dimensions could be different
+        // when the popup is opened again, e.g. through touch mode sizing.
+        this._mainViewHeight = 0;
+        this._mainViewWidth = 0;
+        this._viewContainer.style.removeProperty("min-height");
+        this._viewStack.style.removeProperty("max-height");
+        this._viewContainer.style.removeProperty("min-width");
+        this._viewContainer.style.removeProperty("max-width");

        this._dispatchViewEvent(this.node, "PanelMultiViewHidden");
        break;
--- a/browser/components/customizableui/content/panelUI.css
+++ b/browser/components/customizableui/content/panelUI.css
@ -2,45 +2,23 @@
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

-.panel-viewstack[viewtype="main"] > .panel-clickcapturer {
-  pointer-events: none;
-}
-
 .panel-viewcontainer {
  overflow: hidden;
 }

 .panel-viewstack {
+  overflow: visible;
  transition: height var(--panelui-subview-transition-duration);
 }

-.panel-subviews {
-  -moz-stack-sizing: ignore-horizontal;
-  transform: translateX(0);
-}
-
-.panel-viewstack[viewtype="main"] > .panel-subviews {
-  -moz-stack-sizing: ignore;
-}
-
-.panel-subviews[panelopen] {
-  transition: transform var(--panelui-subview-transition-duration);
-}
-
-.panel-viewcontainer[panelopen]:-moz-any(:not([viewtype="main"]),[transitioning]) {
+.panel-viewcontainer[panelopen] {
  transition-property: height;
  transition-timing-function: var(--animation-easing-function);
  transition-duration: var(--panelui-subview-transition-duration);
  will-change: height;
 }

-/* START photon adjustments */
-
-photonpanelmultiview > .panel-viewcontainer > .panel-viewstack {
-  overflow: visible;
-}
-
-photonpanelmultiview[transitioning] {
+panelmultiview[transitioning] {
  pointer-events: none;
 }

@ -55,5 +33,3 @@ photonpanelmultiview[transitioning] {
  margin: 0;
  padding: 0;
 }
-
-/* END photon adjustments */
--- a/browser/components/customizableui/content/panelUI.inc.xul
+++ b/browser/components/customizableui/content/panelUI.inc.xul
@ -9,7 +9,7 @@
       position="bottomcenter topright"
       photon="true"
       hidden="true">
-  <photonpanelmultiview mainViewId="widget-overflow-mainView" disablekeynav="true">
+  <panelmultiview mainViewId="widget-overflow-mainView" disablekeynav="true">
    <panelview id="widget-overflow-mainView"
               context="toolbar-context-menu">
      <vbox class="panel-subview-body">
@ -24,7 +24,7 @@
                      accesskey="&overflowCustomizeToolbar.accesskey;"
                      label="&overflowCustomizeToolbar.label;"/>
    </panelview>
-  </photonpanelmultiview>
+  </panelmultiview>
  <!-- This menu is here because not having it in the menu in which it's used flickers
       when hover styles overlap. See https://bugzilla.mozilla.org/show_bug.cgi?id=1378427 .
       -->
@ -164,8 +164,8 @@
       flip="slide"
       position="bottomcenter topright"
       noautofocus="true">
-  <photonpanelmultiview id="appMenu-multiView" mainViewId="appMenu-mainView"
-                        viewCacheId="appMenu-viewCache">
+  <panelmultiview id="appMenu-multiView" mainViewId="appMenu-mainView"
+                  viewCacheId="appMenu-viewCache">
    <panelview id="appMenu-mainView" class="PanelUI-subView"
               descriptionheightworkaround="true">
      <vbox class="panel-subview-body">
@ -667,7 +667,7 @@
                       label-checked="&hideBookmarksToolbar.label;"/>
      </vbox>
    </panelview>
-  </photonpanelmultiview>
+  </panelmultiview>
 </panel>

 <panel id="downloads-button-autohide-panel"
--- a/browser/components/customizableui/content/panelUI.js
+++ b/browser/components/customizableui/content/panelUI.js
@ -399,7 +399,7 @@ const PanelUI = {

    this.ensureLibraryInitialized(viewNode);

-    let container = aAnchor.closest("panelmultiview,photonpanelmultiview");
+    let container = aAnchor.closest("panelmultiview");
    if (container) {
      container.showSubView(aViewId, aAnchor);
    } else if (!aAnchor.open) {
@ -434,7 +434,7 @@ const PanelUI = {
      let listener = () => viewShown = true;
      viewNode.addEventListener("ViewShown", listener, {once: true});

-      let multiView = document.createElement("photonpanelmultiview");
+      let multiView = document.createElement("panelmultiview");
      multiView.setAttribute("id", "customizationui-widget-multiview");
      multiView.setAttribute("viewCacheId", "appMenu-viewCache");
      multiView.setAttribute("mainViewId", viewNode.id);
--- a/browser/components/customizableui/content/panelUI.xml
+++ b/browser/components/customizableui/content/panelUI.xml
@ -18,26 +18,14 @@
      <stylesheet src="chrome://browser/content/customizableui/panelUI.css"/>
    </resources>
    <content>
-      <xul:vbox anonid="viewContainer" class="panel-viewcontainer" xbl:inherits="panelopen,viewtype,transitioning">
-        <xul:stack anonid="viewStack" xbl:inherits="viewtype,transitioning" class="panel-viewstack">
-          <xul:vbox anonid="mainViewContainer" class="panel-mainview" xbl:inherits="viewtype"/>
-
-          <!-- Used to capture click events over the PanelUI-mainView if we're in
-               subview mode. That way, any click on the PanelUI-mainView causes us
-               to revert to the mainView mode, whereupon PanelUI-click-capture then
-               allows click events to go through it. -->
-          <xul:vbox anonid="clickCapturer" class="panel-clickcapturer"/>
-
-          <!-- We manually set display: none (via a CSS attribute selector) on the
-               subviews that are not being displayed. We're using this over a deck
-               because a deck assumes the size of its largest child, regardless of
-               whether or not it is shown. That's not good for our case, since we
-               want to allow each subview to be uniquely sized. -->
-          <xul:vbox anonid="subViews" class="panel-subviews" xbl:inherits="panelopen">
-            <children includes="panelview"/>
-          </xul:vbox>
-        </xul:stack>
-      </xul:vbox>
+      <xul:box anonid="viewContainer" class="panel-viewcontainer" xbl:inherits="panelopen,transitioning">
+        <xul:box anonid="viewStack" xbl:inherits="transitioning" class="panel-viewstack">
+          <children includes="panelview"/>
+        </xul:box>
+      </xul:box>
+      <xul:box class="panel-viewcontainer offscreen">
+        <xul:box anonid="offscreenViewStack" class="panel-viewstack"/>
+      </xul:box>
    </content>
    <implementation>
      <constructor><![CDATA[
@ -51,19 +39,6 @@
    </implementation>
  </binding>

-  <binding id="photonpanelmultiview" extends="chrome://browser/content/customizableui/panelUI.xml#panelmultiview">
-    <content>
-      <xul:box anonid="viewContainer" class="panel-viewcontainer" xbl:inherits="panelopen,transitioning">
-        <xul:box anonid="viewStack" xbl:inherits="transitioning" class="panel-viewstack">
-          <children includes="panelview"/>
-        </xul:box>
-      </xul:box>
-      <xul:box class="panel-viewcontainer offscreen">
-        <xul:box anonid="offscreenViewStack" class="panel-viewstack"/>
-      </xul:box>
-    </content>
-  </binding>
-
  <binding id="panelview">
    <content>
      <xul:box class="panel-header" anonid="header">
--- a/browser/components/customizableui/test/browser_967000_button_charEncoding.js
+++ b/browser/components/customizableui/test/browser_967000_button_charEncoding.js
@ -46,7 +46,7 @@ add_task(async function() {

  let checkedButtons = characterEncodingView.querySelectorAll("toolbarbutton[checked='true']");
  is(checkedButtons.length, 2, "There should be 2 checked items (1 charset, 1 detector).");
-  is(checkedButtons[0].getAttribute("label"), "Unicode", "The unicode encoding is correctly selected");
+  is(checkedButtons[0].getAttribute("label"), "Western", "The western encoding is correctly selected");
  is(characterEncodingView.querySelectorAll("#PanelUI-characterEncodingView-autodetect toolbarbutton[checked='true']").length,
     1,
     "There should be 1 checked detector.");
--- a/browser/components/customizableui/test/browser_987640_charEncoding.js
+++ b/browser/components/customizableui/test/browser_987640_charEncoding.js
@ -26,32 +26,34 @@ add_task(async function() {

  let checkedButtons = characterEncodingView.querySelectorAll("toolbarbutton[checked='true']");
  let initialEncoding = checkedButtons[0];
-  is(initialEncoding.getAttribute("label"), "Unicode", "The unicode encoding is initially selected");
+  is(initialEncoding.getAttribute("label"), "Western", "The western encoding is initially selected");

  // change the encoding
  let encodings = characterEncodingView.querySelectorAll("toolbarbutton");
  let newEncoding = encodings[0].hasAttribute("checked") ? encodings[1] : encodings[0];
-  let tabLoadPromise = promiseTabLoadEvent(gBrowser.selectedTab, TEST_PAGE);
+  let browserStopPromise = BrowserTestUtils.browserStopped(gBrowser, TEST_PAGE);
  newEncoding.click();
-  await tabLoadPromise;
+  await browserStopPromise;
+  is(gBrowser.selectedBrowser.characterSet, "UTF-8", "The encoding should be changed to UTF-8");
+  ok(!gBrowser.selectedBrowser.mayEnableCharacterEncodingMenu, "The encoding menu should be disabled");

  // check that the new encodng is applied
  await document.getElementById("nav-bar").overflowable.show();
  charEncodingButton.click();
  checkedButtons = characterEncodingView.querySelectorAll("toolbarbutton[checked='true']");
  let selectedEncodingName = checkedButtons[0].getAttribute("label");
-  ok(selectedEncodingName != "Unicode", "The encoding was changed to " + selectedEncodingName);
+  ok(selectedEncodingName == "Unicode", "The encoding was changed to " + selectedEncodingName);

-  // reset the initial encoding
+  CustomizableUI.removeWidgetFromArea("characterencoding-button");
+  CustomizableUI.addWidgetToArea("characterencoding-button",
+                                  CustomizableUI.AREA_FIXED_OVERFLOW_PANEL);
+  await waitForOverflowButtonShown();
  await document.getElementById("nav-bar").overflowable.show();
-  charEncodingButton.click();
-  tabLoadPromise = promiseTabLoadEvent(gBrowser.selectedTab, TEST_PAGE);
-  initialEncoding.click();
-  await tabLoadPromise;
-  await document.getElementById("nav-bar").overflowable.show();
-  charEncodingButton.click();
-  checkedButtons = characterEncodingView.querySelectorAll("toolbarbutton[checked='true']");
-  is(checkedButtons[0].getAttribute("label"), "Unicode", "The encoding was reset to Unicode");
+  charEncodingButton = document.getElementById("characterencoding-button");
+
+  // check the encoding menu again
+  is(charEncodingButton.getAttribute("disabled"), "true", "We should disable the encoding menu");
+
  await BrowserTestUtils.removeTab(newTab);
 });

--- a/browser/components/customizableui/test/browser_overflow_use_subviews.js
+++ b/browser/components/customizableui/test/browser_overflow_use_subviews.js
@ -39,7 +39,7 @@ add_task(async function check_developer_subview_in_overflow() {
  let subviewShownPromise = subviewShown(developerView);
  button.click();
  await subviewShownPromise;
-  let hasSubviews = !!kOverflowPanel.querySelector("photonpanelmultiview,panelmultiview");
+  let hasSubviews = !!kOverflowPanel.querySelector("panelmultiview");
  let expectedPanel = hasSubviews ? kOverflowPanel : document.getElementById("customizationui-widget-panel");
  is(developerView.closest("panel"), expectedPanel, "Should be inside the panel");
  expectedPanel.hidePopup();
--- a/browser/components/customizableui/test/support/test_967000_charEncoding_page.html
+++ b/browser/components/customizableui/test/support/test_967000_charEncoding_page.html
@ -1,7 +1,7 @@
 <!DOCTYPE html>
 <html>
  <head>
-    <meta charset="utf-8">
+    <meta charset="iso-8859-1">
    <title>Test page</title>
  </head>

--- a/browser/components/downloads/content/download.xml
+++ b/browser/components/downloads/content/download.xml
@ -110,21 +110,6 @@
    </content>
  </binding>

-  <binding id="download-toolbarbutton"
-           extends="chrome://global/content/bindings/toolbarbutton.xml#toolbarbutton-badged">
-    <content>
-      <xul:stack class="toolbarbutton-badge-stack">
-        <children />
-        <xul:image class="toolbarbutton-icon" xbl:inherits="validate,src=image,label,consumeanchor"/>
-        <xul:label class="toolbarbutton-badge" xbl:inherits="value=badge" top="0" end="0" crop="none"/>
-      </xul:stack>
-      <xul:label class="toolbarbutton-text" crop="right" flex="1"
-                 xbl:inherits="value=label,accesskey,crop,wrap"/>
-      <xul:label class="toolbarbutton-multiline-text" flex="1"
-                 xbl:inherits="xbl:text=label,accesskey,wrap"/>
-    </content>
-  </binding>
-
  <binding id="download-subview-toolbarbutton"
           extends="chrome://global/content/bindings/button.xml#menu-button-base">
    <content>
--- a/browser/components/downloads/content/downloads.css
+++ b/browser/components/downloads/content/downloads.css
@ -198,8 +198,7 @@ richlistitem.download button {
 /* Make the panel wide enough to show the download list items without improperly
   truncating them. */
 #downloadsPanel-multiView > .panel-viewcontainer,
-#downloadsPanel-multiView > .panel-viewcontainer > .panel-viewstack,
-#downloadsPanel-multiView > .panel-viewcontainer > .panel-viewstack > .panel-mainview {
+#downloadsPanel-multiView > .panel-viewcontainer > .panel-viewstack {
  max-width: unset;
 }

--- a/browser/components/downloads/content/downloadsOverlay.xul
+++ b/browser/components/downloads/content/downloadsOverlay.xul
@ -109,8 +109,8 @@
                  label="&cmd.clearDownloads.label;"/>
      </menupopup>

-      <photonpanelmultiview id="downloadsPanel-multiView"
-                            mainViewId="downloadsPanel-mainView">
+      <panelmultiview id="downloadsPanel-multiView"
+                      mainViewId="downloadsPanel-mainView">

        <panelview id="downloadsPanel-mainView">
          <vbox class="panel-view-body-unscrollable">
@ -207,7 +207,7 @@
                         oncommand="BrowserDownloadsUI(); CustomizableUI.hidePanelForNode(this);"/>
        </panelview>

-      </photonpanelmultiview>
+      </panelmultiview>

    </panel>
  </popupset>
--- a/browser/components/nsBrowserGlue.js
+++ b/browser/components/nsBrowserGlue.js
@ -2204,7 +2204,7 @@ BrowserGlue.prototype = {
          let defaultEngine = Services.search.originalDefaultEngine;
          defaultEngine.hidden = false;
          Services.search.currentEngine = defaultEngine;
-          Services.prefs.setIntPref("browser.search.reset.status", "silent");
+          Services.prefs.setCharPref("browser.search.reset.status", "silent");
        }
      });
    }
--- a/browser/components/search/content/searchReset.xhtml
+++ b/browser/components/search/content/searchReset.xhtml
@ -41,7 +41,7 @@
        <p>&searchreset.pageInfo1;</p>
        <p>&searchreset.selector.label;<span id="defaultEngine"/></p>

-        <p>&searchreset.beforelink.pageInfo2;<a id="linkSettingsPage" href="about:preferences">&searchreset.link.pageInfo2;</a>&searchreset.afterlink.pageInfo2;</p>
+        <p>&searchreset.beforelink.pageInfo2;<a id="linkSettingsPage" href="about:preferences#search">&searchreset.link.pageInfo2;</a>&searchreset.afterlink.pageInfo2;</p>
      </div>

      <div class="button-container">
--- a/browser/components/search/test/browser_aboutSearchReset.js
+++ b/browser/components/search/test/browser_aboutSearchReset.js
@ -115,7 +115,7 @@ var gTests = [
    Services.prefs.setCharPref(kStatusPref, "pending");
    let loadPromise = BrowserTestUtils.browserLoaded(gBrowser.selectedBrowser,
                                                     false,
-                                                     "about:preferences");
+                                                     "about:preferences#search");
    // eslint-disable-next-line mozilla/no-cpows-in-tests
    gBrowser.contentDocument.getElementById("linkSettingsPage").click();
    await loadPromise;
--- a/browser/components/sessionstore/test/browser.ini
+++ b/browser/components/sessionstore/test/browser.ini
@ -219,7 +219,7 @@ skip-if = true # Needs to be rewritten as Marionette test, bug 995916
 [browser_739531.js]
 [browser_739805.js]
 [browser_819510_perwindowpb.js]
-skip-if = (os == 'win' && bits == 64) || (os == "mac") # Win: Bug 1284312, Mac: Bug 1341980
+skip-if = (os == 'win' && bits == 64) || (os == "mac") || (os == "linux") # Win: Bug 1284312, Mac: Bug 1341980, Linux: bug 1381451
 [browser_not_collect_when_idle.js]

 # Disabled for frequent intermittent failures
--- a/browser/config/mozconfigs/linux64/debug-searchfox-clang
+++ b/browser/config/mozconfigs/linux64/debug-searchfox-clang
@ -0,0 +1,25 @@
+MOZ_AUTOMATION_BUILD_SYMBOLS=0
+MOZ_AUTOMATION_PACKAGE_TESTS=0
+MOZ_AUTOMATION_L10N_CHECK=0
+
+. "$topsrcdir/build/mozconfig.common"
+
+ac_add_options --enable-debug
+ac_add_options --enable-dmd
+
+. $topsrcdir/build/mozconfig.stylo
+
+# Use Clang as specified in manifest
+export CC="$topsrcdir/clang/bin/clang"
+export CXX="$topsrcdir/clang/bin/clang++"
+
+# Add the static checker
+ac_add_options --enable-clang-plugin
+ac_add_options --enable-mozsearch-plugin
+
+. "$topsrcdir/build/unix/mozconfig.stdcxx"
+
+export PKG_CONFIG_LIBDIR=/usr/lib64/pkgconfig:/usr/share/pkgconfig
+. $topsrcdir/build/unix/mozconfig.gtk
+
+. "$topsrcdir/build/mozconfig.common.override"
--- a/browser/config/mozconfigs/macosx64/debug-searchfox
+++ b/browser/config/mozconfigs/macosx64/debug-searchfox
@ -0,0 +1,13 @@
+MOZ_AUTOMATION_BUILD_SYMBOLS=0
+MOZ_AUTOMATION_PACKAGE_TESTS=0
+MOZ_AUTOMATION_L10N_CHECK=0
+
+. $topsrcdir/build/macosx/mozconfig.common
+
+ac_add_options --enable-debug
+ac_add_options --enable-dmd
+
+ac_add_options --enable-clang-plugin
+ac_add_options --enable-mozsearch-plugin
+
+. "$topsrcdir/build/mozconfig.common.override"
--- a/browser/config/mozconfigs/win32/debug-searchfox
+++ b/browser/config/mozconfigs/win32/debug-searchfox
@ -0,0 +1,17 @@
+MOZ_AUTOMATION_BUILD_SYMBOLS=0
+MOZ_AUTOMATION_PACKAGE_TESTS=0
+MOZ_AUTOMATION_L10N_CHECK=0
+
+. "$topsrcdir/build/mozconfig.win-common"
+. "$topsrcdir/browser/config/mozconfigs/common"
+
+ac_add_options --enable-optimize
+ac_add_options --enable-debug
+
+ac_add_options --enable-clang-plugin
+ac_add_options --enable-mozsearch-plugin
+
+. $topsrcdir/build/win32/mozconfig.vs-latest
+
+. "$topsrcdir/build/mozconfig.common.override"
+. "$topsrcdir/build/mozconfig.clang-cl"
--- a/browser/themes/linux/customizableui/panelUI.css
+++ b/browser/themes/linux/customizableui/panelUI.css
@ -4,10 +4,6 @@

 %include ../../shared/customizableui/panelUI.inc.css

-.panel-subviews {
-  background-color: var(--arrowpanel-background);
-}
-
 #BMB_bookmarksPopup > menuitem[type="checkbox"] {
  -moz-appearance: none !important; /* important, to override toolkit rule */
 }
--- a/browser/themes/osx/controlcenter/panel.css
+++ b/browser/themes/osx/controlcenter/panel.css
@ -10,15 +10,6 @@
  box-shadow: var(--focus-ring-box-shadow);
 }

-#identity-popup-multiView > .panel-viewcontainer > .panel-viewstack > .panel-subviews {
-  border-bottom-right-radius: 3.5px;
-}
-
-#identity-popup-multiView > .panel-viewcontainer > .panel-viewstack > .panel-subviews:-moz-locale-dir(rtl) {
-  border-bottom-right-radius: 0;
-  border-bottom-left-radius: 3.5px;
-}
-
 #tracking-action-block,
 #tracking-action-unblock,
 #tracking-action-unblock-private,
--- a/browser/themes/osx/customizableui/panelUI.css
+++ b/browser/themes/osx/customizableui/panelUI.css
@ -4,10 +4,6 @@

 %include ../../shared/customizableui/panelUI.inc.css

-.panel-subviews {
-  background-color: hsla(0,0%,100%,.97);
-}
-
 .restoreallitem > .toolbarbutton-icon {
  display: none;
 }
@ -20,7 +16,7 @@
  padding-inline-start: 14px;
 }

-photonpanelmultiview .toolbaritem-combined-buttons > spacer {
+panelmultiview .toolbaritem-combined-buttons > spacer {
  width: 42px; /* 18px toolbarbutton padding + 16px icon + 8px label padding start */
 }

--- a/browser/themes/shared/controlcenter/panel.inc.css
+++ b/browser/themes/shared/controlcenter/panel.inc.css
@ -68,20 +68,6 @@
  max-width: 30em;
 }

-#identity-popup-multiView > .panel-viewcontainer > .panel-viewstack[viewtype="main"] > .panel-subviews {
-  transform: translateX(100%);
-  box-shadow: none;
-}
-
-#identity-popup-multiView > .panel-viewcontainer > .panel-viewstack[viewtype="main"] > .panel-subviews:-moz-locale-dir(rtl) {
-  transform: translateX(-100%);
-}
-
-#identity-popup-multiView > .panel-viewcontainer > .panel-viewstack > .panel-subviews {
-  background: var(--arrowpanel-background);
-  padding: 0;
-}
-
 .identity-popup-section:not(:first-child) {
  border-top: 1px solid var(--panel-separator-color);
 }
@ -164,7 +150,7 @@
 .identity-popup-host {
  word-wrap: break-word;
  /* 1em + 2em + 24px is .identity-popup-security-content padding
-   * 30em is .panel-mainview width */
+   * 30em is the panel width */
  max-width: calc(30rem - 3rem - 24px - @identityPopupExpanderWidth@);
 }

--- a/browser/themes/shared/customizableui/panelUI.inc.css
+++ b/browser/themes/shared/customizableui/panelUI.inc.css
@ -22,7 +22,6 @@
 %define panelPaletteIconSize 16px

 :root {
-  --panel-ui-exit-subview-gutter-width: 38px;
  --appmenu-yellow-warning-border-color: hsl(45, 100%, 77%);
  --appmenu-yellow-warning-color: #FFEFBF;
  --appmenu-yellow-warning-hover-color: #FFE8A2;
@ -114,26 +113,11 @@
  background: #FFBF00 url(chrome://browser/skin/update-badge-failed.svg) no-repeat center;
 }

-.panel-subviews {
-  padding: 4px;
-  background-clip: padding-box;
-  border-left: 1px solid var(--arrowpanel-border-color);
-  box-shadow: 0 3px 5px hsla(210,4%,10%,.1),
-              0 0 7px hsla(210,4%,10%,.1);
-  margin-inline-start: var(--panel-ui-exit-subview-gutter-width);
-}
-
-.panel-viewstack[viewtype="main"] > .panel-subviews {
-  transform: translateX(@menuPanelWidth@);
-}
-
-.panel-viewstack[viewtype="main"] > .panel-subviews:-moz-locale-dir(rtl) {
-  transform: translateX(-@menuPanelWidth@);
-}
-
 panelview {
  -moz-box-orient: vertical;
  -moz-box-flex: 1;
+  background: var(--arrowpanel-background);
+  padding: 0;
 }

 /* This section is to anchor all the drop down panels at the same height, shift the
@ -200,6 +184,7 @@ panelview {
  overflow-y: auto;
  overflow-x: hidden;
  -moz-box-flex: 1;
+  padding: 6px 0;
 }

 .panel-view-body-unscrollable {
@ -242,8 +227,7 @@ panel[photon] > .panel-arrowcontainer > .panel-arrowcontent {
  margin-inline-start: 0;
 }

-#BMB_bookmarksPopup,
-.panel-mainview {
+#BMB_bookmarksPopup {
  max-width: @standaloneSubviewWidth@;
 }

@ -323,11 +307,6 @@ panel[photon] > .panel-arrowcontainer > .panel-arrowcontent {
  opacity: 1;
 }

-/* Give WebExtension stand-alone panels extra width for Chrome compatibility */
-.cui-widget-panel[viewId^=PanelUI-webext-] .panel-mainview {
-  max-width: 800px;
-}
-
 .cui-widget-panel[viewId^=PanelUI-webext-] > .panel-arrowcontainer > .panel-arrowcontent {
  padding: 0;
 }
@ -347,18 +326,11 @@ panelview:not([mainview]) .toolbarbutton-text,
  padding: 4px 0;
 }

-/* START photonpanelview adjustments */
-
 #appMenu-popup > .panel-arrowcontainer > .panel-arrowcontent,
 panel[photon] > .panel-arrowcontainer > .panel-arrowcontent {
  padding: 0;
 }

-photonpanelmultiview panelview {
-  background: var(--arrowpanel-background);
-  padding: 0;
-}
-
 #appMenu-popup panelview,
 #customizationui-widget-multiview panelview:not([extension]) {
  min-width: @menuPanelWidth@;
@ -377,12 +349,6 @@ photonpanelmultiview panelview {
  min-width: calc(@menuPanelWidth@ + 32px);
 }

-photonpanelmultiview .panel-subview-body {
-  padding: 6px 0;
-}
-
-/* END photonpanelview adjustments */
-
 .cui-widget-panel.cui-widget-panelWithFooter > .panel-arrowcontainer > .panel-arrowcontent {
  padding-bottom: 0;
 }
@ -461,7 +427,8 @@ toolbarbutton[constrain-size="true"][cui-areatype="menu-panel"] > .toolbarbutton
  content: "";
  width: 16px;
  height: 16px;
-  margin-inline-end: 16.5px;
+  margin-inline-start: 10px;
+  margin-inline-end: 12px;
  display: -moz-box;
 }

@ -904,25 +871,9 @@ panelview .toolbarbutton-1,
  color: inherit;
 }

-/* START photon adjustments */
-
 .subviewbutton[checked="true"] {
-  background: url(chrome://browser/skin/check.svg) center left 7px / 11px 11px no-repeat transparent;
-  fill: currentColor;
-}
-
-.subviewbutton[checked="true"]:-moz-locale-dir(rtl) {
-  background-position: center right 7px;
-}
-
-photonpanelmultiview .subviewbutton[checked="true"] {
-  background: none;
  list-style-image: url(chrome://browser/skin/check.svg);
-}
-
-photonpanelmultiview .subviewbutton > .menu-iconic-left {
-  -moz-appearance: none;
-  margin-inline-end: 0;
+  fill: currentColor;
 }

 #appMenu-popup .toolbaritem-combined-buttons {
@ -933,22 +884,22 @@ photonpanelmultiview .subviewbutton > .menu-iconic-left {
  margin-inline-end: 8px;
 }

-photonpanelmultiview .toolbaritem-combined-buttons > label {
+panelmultiview .toolbaritem-combined-buttons > label {
  -moz-box-flex: 1;
  font: menu;
  margin: 0;
 }

-photonpanelmultiview .toolbaritem-combined-buttons > spacer.before-label {
+panelmultiview .toolbaritem-combined-buttons > spacer.before-label {
  width: 36px; /* 12px toolbarbutton padding + 16px icon + 8px label padding start */
 }

-photonpanelmultiview .toolbaritem-combined-buttons > spacer.after-label {
+panelmultiview .toolbaritem-combined-buttons > spacer.after-label {
  -moz-box-flex: 1;
  width: 20px; /* a little bigger than the width of the scrollbar */
 }

-photonpanelmultiview .PanelUI-subView .toolbaritem-combined-buttons > .subviewbutton {
+.PanelUI-subView .toolbaritem-combined-buttons > .subviewbutton {
  -moz-box-flex: 0;
  height: auto;
  margin-inline-start: 18px;
@ -975,44 +926,33 @@ photonpanelmultiview .PanelUI-subView .toolbaritem-combined-buttons > .subviewbu
  margin-inline-start: 0;
 }

-photonpanelmultiview .PanelUI-subView .toolbaritem-combined-buttons >
-  .subviewbutton-iconic > .toolbarbutton-text,
-photonpanelmultiview .PanelUI-subView .toolbaritem-combined-buttons >
-  .subviewbutton:not(.subviewbutton-iconic) > .toolbarbutton-icon {
+.PanelUI-subView .toolbaritem-combined-buttons > .subviewbutton-iconic > .toolbarbutton-text,
+.PanelUI-subView .toolbaritem-combined-buttons > .subviewbutton:not(.subviewbutton-iconic) > .toolbarbutton-icon {
  display: none;
 }

 /* Using this selector, because this way the hover and active selectors will apply properly. */
-photonpanelmultiview .PanelUI-subView .toolbaritem-combined-buttons >
-  .subviewbutton:not(.subviewbutton-iconic) {
+.PanelUI-subView .toolbaritem-combined-buttons > .subviewbutton:not(.subviewbutton-iconic) {
  background-color: #f9f9f9;
  border: 1px solid #e1e1e1;
  border-radius: 10000px;
  padding: 1px 8px;
 }

-photonpanelmultiview .toolbaritem-combined-buttons > .subviewbutton:not(.subviewbutton-iconic) > .toolbarbutton-text {
+.toolbaritem-combined-buttons > .subviewbutton:not(.subviewbutton-iconic) > .toolbarbutton-text {
  font-size: 1em;
  padding-inline-start: 0;
 }

-photonpanelmultiview .addon-banner-item::after,
-photonpanelmultiview .panel-banner-item::after {
-  margin-inline-end: 12px;
-  margin-inline-start: 10px;
-}
-
-photonpanelmultiview .subview-subheader {
+.subview-subheader {
  color: GrayText;
 }

-photonpanelmultiview .subview-subheader,
-photonpanelmultiview .panel-subview-footer {
+.subview-subheader,
+.panel-subview-footer {
  font: menu;
 }

-/* END photon adjustments */
-
 panelview .toolbarbutton-1 {
  margin-top: 6px;
 }
@ -1108,12 +1048,16 @@ menuitem.panel-subview-footer@menuStateActive@,
  padding: 0;
 }

-.PanelUI-subView menuseparator,
-.PanelUI-subView toolbarseparator {
+.PanelUI-subView menuseparator {
  margin-inline-start: -5px;
  margin-inline-end: -4px;
 }

+.PanelUI-subView toolbarseparator {
+  margin-inline-start: 0;
+  margin-inline-end: 0;
+}
+
 .PanelUI-subView menuseparator.small-separator,
 .PanelUI-subView toolbarseparator.small-separator {
  margin-left: 5px;
@ -1240,7 +1184,6 @@ toolbarpaletteitem[place=panel] > .toolbaritem-combined-buttons > toolbarbutton
  padding: 0;
 }

-.cui-widget-panelview,
 #widget-overflow-mainView .panel-subview-body {
  overflow-y: auto;
  overflow-x: hidden;
@ -1293,14 +1236,13 @@ toolbarpaletteitem[place=panel] > .subviewbutton-nav::after {

 .subviewbutton > .menu-iconic-left {
  -moz-appearance: none;
-  margin-inline-end: 3px;
+  margin-inline-end: 0;
 }

 menuitem[checked="true"].subviewbutton > .menu-iconic-left {
  visibility: hidden;
 }

-.panel-mainview[panelid=customizationui-widget-panel],
 #PanelUI-panicView > .panel-subview-body,
 #PanelUI-panicView {
  overflow: visible;
@ -1493,8 +1435,6 @@ menuitem[checked="true"].subviewbutton > .menu-iconic-left {
  }
 }

-/* START photon adjustments */
-
 .panel-header {
  align-items: center;
  border-bottom: 1px solid var(--panel-separator-color);
@ -1514,7 +1454,7 @@ menuitem[checked="true"].subviewbutton > .menu-iconic-left {
  text-align: center;
 }

-photonpanelmultiview .PanelUI-subView .panel-header > .subviewbutton-back {
+.PanelUI-subView .panel-header > .subviewbutton-back {
  -moz-context-properties: fill;
  fill: var(--arrowpanel-color);
  list-style-image: url(chrome://browser/skin/arrow-left.svg);
@ -1531,18 +1471,7 @@ photonpanelmultiview .PanelUI-subView .panel-header > .subviewbutton-back {
  display: none !important;
 }

-photonpanelmultiview .PanelUI-subView toolbarseparator {
-  margin-inline-start: 0;
-  margin-inline-end: 0;
-}
-
-/* This is explicitly overriding the overflow properties set above. */
-photonpanelmultiview .cui-widget-panelview {
-  overflow-x: visible;
-  overflow-y: visible;
-}
-
-photonpanelmultiview #panelMenu_pocket {
+#panelMenu_pocket {
  display: none;
 }

@ -1597,5 +1526,3 @@ photonpanelmultiview #panelMenu_pocket {
 .subviewbutton.download:-moz-any([openLabel],[retryLabel]) > .action-button@buttonStateActive@ {
  background-color: var(--arrowpanel-dimmed-even-further);
 }
-
-/* END photon adjustments */
--- a/browser/themes/shared/downloads/downloads.inc.css
+++ b/browser/themes/shared/downloads/downloads.inc.css
@ -15,10 +15,6 @@

 #downloadsPanel > .panel-arrowcontainer > .panel-arrowcontent {
  overflow: hidden;
-}
-
-#downloadsPanel > .panel-arrowcontainer > .panel-arrowcontent,
-#downloadsPanel-multiView > .panel-viewcontainer > .panel-viewstack > .panel-subviews {
  padding: 0;
 }

--- a/browser/themes/windows/customizableui/panelUI.css
+++ b/browser/themes/windows/customizableui/panelUI.css
@ -4,10 +4,6 @@

 %include ../../shared/customizableui/panelUI.inc.css

-.panel-subviews {
-  background-color: var(--arrowpanel-background);
-}
-
 /* bookmark panel submenus */

 #BMB_bookmarksPopup menupopup[placespopup=true] {
--- a/docshell/base/nsDocShell.cpp
+++ b/docshell/base/nsDocShell.cpp
@ -3864,7 +3864,6 @@ ItemIsActive(nsIDocShellTreeItem* aItem)
 {
  if (nsCOMPtr<nsPIDOMWindowOuter> window = aItem->GetWindow()) {
    auto* win = nsGlobalWindowOuter::Cast(window);
-    MOZ_ASSERT(win->IsOuterWindow());
    if (!win->GetClosedOuter()) {
      return true;
    }
--- a/dom/audiochannel/AudioChannelAgent.cpp
+++ b/dom/audiochannel/AudioChannelAgent.cpp
@ -1,5 +1,3 @@
-/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
-/* vim: set ts=8 sts=2 et sw=2 tw=80: */
 /* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
@ -77,8 +75,6 @@ AudioChannelAgent::InitWithWeakCallback(mozIDOMWindow* aWindow,
 nsresult
 AudioChannelAgent::FindCorrectWindow(nsPIDOMWindowInner* aWindow)
 {
-  MOZ_ASSERT(aWindow->IsInnerWindow());
-
  mWindow = aWindow->GetScriptableTop();
  if (NS_WARN_IF(!mWindow)) {
    return NS_OK;
@ -142,7 +138,6 @@ AudioChannelAgent::InitInternal(nsPIDOMWindowInner* aWindow,
    return NS_ERROR_FAILURE;
  }

-  MOZ_ASSERT(aWindow->IsInnerWindow());
  mInnerWindowID = aWindow->WindowID();

  nsresult rv = FindCorrectWindow(aWindow);
--- a/dom/audiochannel/AudioChannelService.cpp
+++ b/dom/audiochannel/AudioChannelService.cpp
@ -345,12 +345,10 @@ AudioChannelService::UnregisterAudioChannelAgent(AudioChannelAgent* aAgent)
 AudioPlaybackConfig
 AudioChannelService::GetMediaConfig(nsPIDOMWindowOuter* aWindow) const
 {
-  MOZ_ASSERT(!aWindow || aWindow->IsOuterWindow());
-
  AudioPlaybackConfig config(1.0, false,
                             nsISuspendedTypes::NONE_SUSPENDED);

-  if (!aWindow || !aWindow->IsOuterWindow()) {
+  if (!aWindow) {
    config.SetConfig(0.0, true,
                     nsISuspendedTypes::SUSPENDED_BLOCK);
    return config;
@ -452,7 +450,6 @@ AudioChannelService::RefreshAgents(nsPIDOMWindowOuter* aWindow,
                                   const std::function<void(AudioChannelAgent*)>& aFunc)
 {
  MOZ_ASSERT(aWindow);
-  MOZ_ASSERT(aWindow->IsOuterWindow());

  nsCOMPtr<nsPIDOMWindowOuter> topWindow = aWindow->GetScriptableTop();
  if (!topWindow) {
@ -495,7 +492,6 @@ AudioChannelService::SetWindowAudioCaptured(nsPIDOMWindowOuter* aWindow,
 {
  MOZ_ASSERT(NS_IsMainThread());
  MOZ_ASSERT(aWindow);
-  MOZ_ASSERT(aWindow->IsOuterWindow());

  MOZ_LOG(GetAudioChannelLog(), LogLevel::Debug,
         ("AudioChannelService, SetWindowAudioCaptured, window = %p, "
@ -532,7 +528,6 @@ AudioChannelService::GetOrCreateWindowData(nsPIDOMWindowOuter* aWindow)
 {
  MOZ_ASSERT(NS_IsMainThread());
  MOZ_ASSERT(aWindow);
-  MOZ_ASSERT(aWindow->IsOuterWindow());

  AudioChannelWindow* winData = GetWindowData(aWindow->WindowID());
  if (!winData) {
@ -595,7 +590,6 @@ void
 AudioChannelService::NotifyMediaResumedFromBlock(nsPIDOMWindowOuter* aWindow)
 {
  MOZ_ASSERT(aWindow);
-  MOZ_ASSERT(aWindow->IsOuterWindow());

  nsCOMPtr<nsPIDOMWindowOuter> topWindow = aWindow->GetScriptableTop();
  if (!topWindow) {
@ -974,7 +968,6 @@ AudioChannelService::AudioChannelWindow::MaybeNotifyMediaBlockStart(AudioChannel
    return;
  }

-  MOZ_ASSERT(window->IsOuterWindow());
  nsCOMPtr<nsPIDOMWindowInner> inner = window->GetCurrentInnerWindow();
  if (!inner) {
    return;
--- a/dom/base/BarProps.cpp
+++ b/dom/base/BarProps.cpp
@ -21,7 +21,6 @@ namespace dom {
 BarProp::BarProp(nsGlobalWindowInner* aWindow)
  : mDOMWindow(aWindow)
 {
-  MOZ_ASSERT(aWindow->IsInnerWindow());
 }

 BarProp::~BarProp()
--- a/dom/base/CustomElementRegistry.cpp
+++ b/dom/base/CustomElementRegistry.cpp
@ -224,7 +224,6 @@ CustomElementRegistry::CustomElementRegistry(nsPIDOMWindowInner* aWindow)
 , mIsCustomDefinitionRunning(false)
 {
  MOZ_ASSERT(aWindow);
-  MOZ_ASSERT(aWindow->IsInnerWindow());
  MOZ_ALWAYS_TRUE(mConstructors.init());

  mozilla::HoldJSObjects(this);
--- a/dom/base/EventSource.cpp
+++ b/dom/base/EventSource.cpp
@ -1965,8 +1965,7 @@ EventSource::Constructor(const GlobalObject& aGlobal, const nsAString& aURL,
  nsCOMPtr<nsPIDOMWindowInner> ownerWindow =
    do_QueryInterface(aGlobal.GetAsSupports());

-  MOZ_ASSERT(!NS_IsMainThread() ||
-             (ownerWindow && ownerWindow->IsInnerWindow()));
+  MOZ_ASSERT(!NS_IsMainThread() || ownerWindow);

  RefPtr<EventSource> eventSource =
    new EventSource(ownerWindow, aEventSourceInitDict.mWithCredentials);
--- a/dom/base/Location.cpp
+++ b/dom/base/Location.cpp
@ -42,8 +42,6 @@ namespace dom {
 Location::Location(nsPIDOMWindowInner* aWindow, nsIDocShell *aDocShell)
  : mInnerWindow(aWindow)
 {
-  MOZ_ASSERT(mInnerWindow->IsInnerWindow());
-
  // aDocShell can be null if it gets called after nsDocShell::Destory().
  mDocShell = do_GetWeakReference(aDocShell);
 }
--- a/dom/base/Navigator.cpp
+++ b/dom/base/Navigator.cpp
@ -168,7 +168,6 @@ Navigator::Init()
 Navigator::Navigator(nsPIDOMWindowInner* aWindow)
  : mWindow(aWindow)
 {
-  MOZ_ASSERT(aWindow->IsInnerWindow(), "Navigator must get an inner window!");
 }

 Navigator::~Navigator()
@ -1628,8 +1627,6 @@ Navigator::SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const
 void
 Navigator::SetWindow(nsPIDOMWindowInner *aInnerWindow)
 {
-  NS_ASSERTION(aInnerWindow->IsInnerWindow(),
-               "Navigator must get an inner window!");
  mWindow = aInnerWindow;
 }

@ -1712,7 +1709,6 @@ Navigator::GetWindowFromGlobal(JSObject* aGlobal)
 {
  nsCOMPtr<nsPIDOMWindowInner> win =
    do_QueryInterface(nsJSUtils::GetStaticScriptGlobal(aGlobal));
-  MOZ_ASSERT(!win || win->IsInnerWindow());
  return win.forget();
 }

--- a/dom/base/PostMessageEvent.cpp
+++ b/dom/base/PostMessageEvent.cpp
@ -55,11 +55,6 @@ PostMessageEvent::~PostMessageEvent()
 NS_IMETHODIMP
 PostMessageEvent::Run()
 {
-  MOZ_ASSERT(mTargetWindow->IsOuterWindow(),
-             "should have been passed an outer window!");
-  MOZ_ASSERT(!mSource || mSource->IsOuterWindow(),
-             "should have been passed an outer window!");
-
  // Note: We don't init this AutoJSAPI with targetWindow, because we do not
  // want exceptions during message deserialization to trigger error events on
  // targetWindow.
@ -82,8 +77,6 @@ PostMessageEvent::Run()
      targetWindow->IsClosedOrClosing())
    return NS_OK;

-  MOZ_ASSERT(targetWindow->IsInnerWindow(),
-             "we ordered an inner window!");
  JSAutoCompartment ac(cx, targetWindow->GetWrapper());

  // Ensure that any origin which might have been provided is the origin of this
--- a/dom/base/TimeoutManager.cpp
+++ b/dom/base/TimeoutManager.cpp
@ -410,8 +410,6 @@ TimeoutManager::TimeoutManager(nsGlobalWindowInner& aWindow)
    mThrottleTrackingTimeouts(false),
    mBudgetThrottleTimeouts(false)
 {
-  MOZ_DIAGNOSTIC_ASSERT(aWindow.IsInnerWindow());
-
  MOZ_LOG(gLog, LogLevel::Debug,
          ("TimeoutManager %p created, tracking bucketing %s\n",
           this, gAnnotateTrackingChannels ? "enabled" : "disabled"));
@ -587,7 +585,7 @@ TimeoutManager::SetTimeout(nsITimeoutHandler* aHandler,
  }

  if (gRunningTimeoutDepth == 0 &&
-      mWindow.GetPopupControlState() < openBlocked) {
+      nsContentUtils::GetPopupControlState() < openBlocked) {
    // This timeout is *not* set from another timeout and it's set
    // while popups are enabled. Propagate the state to the timeout if
    // its delay (interval) is equal to or less than what
@ -597,7 +595,7 @@ TimeoutManager::SetTimeout(nsITimeoutHandler* aHandler,
    // because our lower bound for |realInterval| could be pretty high
    // in some cases.
    if (interval <= gDisableOpenClickDelay) {
-      timeout->mPopupState = mWindow.GetPopupControlState();
+      timeout->mPopupState = nsContentUtils::GetPopupControlState();
    }
  }

@ -1197,7 +1195,6 @@ public:
  explicit ThrottleTimeoutsCallback(nsGlobalWindowInner* aWindow)
    : mWindow(aWindow)
  {
-    MOZ_DIAGNOSTIC_ASSERT(aWindow->IsInnerWindow());
  }

  NS_DECL_ISUPPORTS
--- a/dom/base/WindowDestroyedEvent.cpp
+++ b/dom/base/WindowDestroyedEvent.cpp
@ -0,0 +1,138 @@
+#include "WindowDestroyedEvent.h"
+
+#include "nsJSUtils.h"
+#include "jsapi.h"              // for JSAutoRequest
+#include "jswrapper.h"
+#include "nsIPrincipal.h"
+#include "nsISupportsPrimitives.h"
+#include "nsIAppStartup.h"
+#include "nsToolkitCompsCID.h"
+#include "nsCOMPtr.h"
+
+namespace mozilla {
+
+// Try to match compartments that are not web content by matching compartments
+// with principals that are either the system principal or an expanded principal.
+// This may not return true for all non-web-content compartments.
+struct BrowserCompartmentMatcher : public js::CompartmentFilter {
+  bool match(JSCompartment* aC) const override
+  {
+    nsCOMPtr<nsIPrincipal> pc = nsJSPrincipals::get(JS_GetCompartmentPrincipals(aC));
+    return nsContentUtils::IsSystemOrExpandedPrincipal(pc);
+  }
+};
+
+WindowDestroyedEvent::WindowDestroyedEvent(nsGlobalWindowInner* aWindow,
+                                           uint64_t aID, const char* aTopic)
+  : mozilla::Runnable("WindowDestroyedEvent")
+  , mID(aID)
+  , mPhase(Phase::Destroying)
+  , mTopic(aTopic)
+  , mIsInnerWindow(true)
+{
+  mWindow = do_GetWeakReference(aWindow);
+}
+
+WindowDestroyedEvent::WindowDestroyedEvent(nsGlobalWindowOuter* aWindow,
+                                           uint64_t aID, const char* aTopic)
+  : mozilla::Runnable("WindowDestroyedEvent")
+  , mID(aID)
+  , mPhase(Phase::Destroying)
+  , mTopic(aTopic)
+  , mIsInnerWindow(false)
+{
+  mWindow = do_GetWeakReference(aWindow);
+}
+
+NS_IMETHODIMP
+WindowDestroyedEvent::Run()
+{
+  AUTO_PROFILER_LABEL("WindowDestroyedEvent::Run", OTHER);
+
+  nsCOMPtr<nsIObserverService> observerService =
+    services::GetObserverService();
+  if (!observerService) {
+    return NS_OK;
+  }
+
+  nsCOMPtr<nsISupportsPRUint64> wrapper =
+    do_CreateInstance(NS_SUPPORTS_PRUINT64_CONTRACTID);
+  if (wrapper) {
+    wrapper->SetData(mID);
+    observerService->NotifyObservers(wrapper, mTopic.get(), nullptr);
+  }
+
+  switch (mPhase) {
+    case Phase::Destroying:
+    {
+      bool skipNukeCrossCompartment = false;
+#ifndef DEBUG
+      nsCOMPtr<nsIAppStartup> appStartup =
+        do_GetService(NS_APPSTARTUP_CONTRACTID);
+
+      if (appStartup) {
+        appStartup->GetShuttingDown(&skipNukeCrossCompartment);
+      }
+#endif
+
+      if (!skipNukeCrossCompartment) {
+        // The compartment nuking phase might be too expensive, so do that
+        // part off of idle dispatch.
+
+        // For the compartment nuking phase, we dispatch either an
+        // inner-window-nuked or an outer-window-nuked notification.
+        // This will allow tests to wait for compartment nuking to happen.
+        if (mTopic.EqualsLiteral("inner-window-destroyed")) {
+          mTopic.AssignLiteral("inner-window-nuked");
+        } else if (mTopic.EqualsLiteral("outer-window-destroyed")) {
+          mTopic.AssignLiteral("outer-window-nuked");
+        }
+        mPhase = Phase::Nuking;
+
+        nsCOMPtr<nsIRunnable> copy(this);
+        NS_IdleDispatchToCurrentThread(copy.forget(), 1000);
+      }
+    }
+    break;
+
+    case Phase::Nuking:
+    {
+      nsCOMPtr<nsISupports> window = do_QueryReferent(mWindow);
+      if (window) {
+        nsGlobalWindowInner* currentInner;
+        if (mIsInnerWindow) {
+          currentInner = nsGlobalWindowInner::FromSupports(window);
+        } else {
+          nsGlobalWindowOuter* outer = nsGlobalWindowOuter::FromSupports(window);
+          currentInner = outer->GetCurrentInnerWindowInternal();
+        }
+        NS_ENSURE_TRUE(currentInner, NS_OK);
+
+        AutoSafeJSContext cx;
+        JS::Rooted<JSObject*> obj(cx, currentInner->FastGetGlobalJSObject());
+        if (obj && !js::IsSystemCompartment(js::GetObjectCompartment(obj))) {
+          JSCompartment* cpt = js::GetObjectCompartment(obj);
+          nsCOMPtr<nsIPrincipal> pc = nsJSPrincipals::get(JS_GetCompartmentPrincipals(cpt));
+
+          if (BasePrincipal::Cast(pc)->AddonPolicy()) {
+            // We want to nuke all references to the add-on compartment.
+            xpc::NukeAllWrappersForCompartment(cx, cpt,
+                                               mIsInnerWindow ? js::DontNukeWindowReferences
+                                                              : js::NukeWindowReferences);
+          } else {
+            // We only want to nuke wrappers for the chrome->content case
+            js::NukeCrossCompartmentWrappers(cx, BrowserCompartmentMatcher(), cpt,
+                                             mIsInnerWindow ? js::DontNukeWindowReferences
+                                                            : js::NukeWindowReferences,
+                                             js::NukeIncomingReferences);
+          }
+        }
+      }
+    }
+    break;
+  }
+
+  return NS_OK;
+}
+
+} // namespace mozilla
--- a/dom/base/WindowDestroyedEvent.h
+++ b/dom/base/WindowDestroyedEvent.h
@ -0,0 +1,43 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef WindowDestroyedEvent_h
+#define WindowDestroyedEvent_h
+
+#include "nsGlobalWindow.h"
+#include "nsThreadUtils.h"
+#include "nsWeakPtr.h"
+#include "nsString.h"
+
+namespace mozilla {
+
+class WindowDestroyedEvent final : public Runnable
+{
+public:
+  WindowDestroyedEvent(nsGlobalWindowInner* aWindow,
+                       uint64_t aID, const char* aTopic);
+  WindowDestroyedEvent(nsGlobalWindowOuter* aWindow,
+                       uint64_t aID, const char* aTopic);
+
+  enum class Phase
+  {
+    Destroying,
+    Nuking
+  };
+
+  NS_IMETHOD Run() override;
+
+private:
+  uint64_t mID;
+  Phase mPhase;
+  nsCString mTopic;
+  nsWeakPtr mWindow;
+  bool mIsInnerWindow;
+};
+
+} // namespace mozilla
+
+#endif // defined(WindowDestroyedEvent_h)
--- a/dom/base/WindowOrientationObserver.cpp
+++ b/dom/base/WindowOrientationObserver.cpp
@ -21,7 +21,7 @@ WindowOrientationObserver::WindowOrientationObserver(
  nsGlobalWindowInner* aGlobalWindow)
  : mWindow(aGlobalWindow)
 {
-  MOZ_ASSERT(aGlobalWindow && aGlobalWindow->IsInnerWindow());
+  MOZ_ASSERT(aGlobalWindow);
  hal::RegisterScreenConfigurationObserver(this);

  hal::ScreenConfiguration config;
--- a/dom/base/moz.build
+++ b/dom/base/moz.build
@ -363,6 +363,7 @@ UNIFIED_SOURCES += [
    'TimeoutManager.cpp',
    'TreeWalker.cpp',
    'WebKitCSSMatrix.cpp',
+    'WindowDestroyedEvent.cpp',
    'WindowNamedPropertiesHandler.cpp',
    'WindowOrientationObserver.cpp',
    'XPathGenerator.cpp',
@ -388,11 +389,9 @@ SOURCES += [
    'nsDOMWindowUtils.cpp',
    # Conflicts with windows.h's definition of SendMessage.
    'nsFrameMessageManager.cpp',
-    # This file has a #error "Never include windows.h in this file!"
-    'nsGlobalWindow.cpp',
-    # These files are included by nsGlobalWindow.cpp
-    # 'nsGlobalWindowInner.cpp',
-    # 'nsGlobalWindowOuter.cpp',
+    # These files have a #error "Never include windows.h in this file!"
+    'nsGlobalWindowInner.cpp',
+    'nsGlobalWindowOuter.cpp',
    # Conflicts with windows.h's definition of LoadImage.
    'nsImageLoadingContent.cpp',
    # Because of OS X headers.
--- a/dom/base/nsContentPermissionHelper.cpp
+++ b/dom/base/nsContentPermissionHelper.cpp
@ -364,7 +364,6 @@ nsContentPermissionUtils::CreateContentPermissionRequestParent(const nsTArray<Pe
 nsContentPermissionUtils::AskPermission(nsIContentPermissionRequest* aRequest,
                                        nsPIDOMWindowInner* aWindow)
 {
-  MOZ_ASSERT(!aWindow || aWindow->IsInnerWindow());
  NS_ENSURE_STATE(aWindow && aWindow->IsCurrentInnerWindow());

  // for content process
--- a/dom/base/nsContentUtils.cpp
+++ b/dom/base/nsContentUtils.cpp
@ -343,6 +343,11 @@ bool nsContentUtils::sDoNotTrackEnabled = false;

 mozilla::LazyLogModule nsContentUtils::sDOMDumpLog("Dump");

+PopupControlState nsContentUtils::sPopupControlState = openAbused;
+
+int32_t nsContentUtils::sInnerOrOuterWindowCount = 0;
+uint32_t nsContentUtils::sInnerOrOuterWindowSerialCounter = 0;
+
 // Subset of http://www.whatwg.org/specs/web-apps/current-work/#autofill-field-name
 enum AutocompleteUnsupportedFieldName : uint8_t
 {
@ -9017,8 +9022,6 @@ nsContentUtils::IsNonSubresourceRequest(nsIChannel* aChannel)
 nsContentUtils::StorageAccess
 nsContentUtils::StorageAllowedForWindow(nsPIDOMWindowInner* aWindow)
 {
-  MOZ_ASSERT(aWindow->IsInnerWindow());
-
  if (nsIDocument* document = aWindow->GetExtantDoc()) {
    nsCOMPtr<nsIPrincipal> principal = document->NodePrincipal();
    return InternalStorageAllowedForPrincipal(principal, aWindow);
@ -9107,7 +9110,6 @@ nsContentUtils::InternalStorageAllowedForPrincipal(nsIPrincipal* aPrincipal,
                                                   nsPIDOMWindowInner* aWindow)
 {
  MOZ_ASSERT(aPrincipal);
-  MOZ_ASSERT(!aWindow || aWindow->IsInnerWindow());

  StorageAccess access = StorageAccess::eAllow;

@ -10974,3 +10976,44 @@ nsContentUtils::DevToolsEnabled(JSContext* aCx)

  return workerPrivate->DevToolsEnabled();
 }
+
+/* static */ bool
+nsContentUtils::ContentIsLink(nsIContent* aContent)
+{
+  return aContent && (aContent->IsHTMLElement(nsGkAtoms::a) ||
+                      aContent->AttrValueIs(kNameSpaceID_XLink, nsGkAtoms::type,
+                                            nsGkAtoms::simple, eCaseMatters));
+}
+
+/* static */ already_AddRefed<EventTarget>
+nsContentUtils::TryGetTabChildGlobalAsEventTarget(nsISupports* aFrom)
+{
+  nsCOMPtr<nsIFrameLoaderOwner> frameLoaderOwner = do_QueryInterface(aFrom);
+  if (!frameLoaderOwner) {
+    return nullptr;
+  }
+
+  RefPtr<nsFrameLoader> frameLoader = frameLoaderOwner->GetFrameLoader();
+  if (!frameLoader) {
+    return nullptr;
+  }
+
+  nsCOMPtr<EventTarget> target = frameLoader->GetTabChildGlobalAsEventTarget();
+  return target.forget();
+}
+
+/* static */ uint32_t
+nsContentUtils::InnerOrOuterWindowCreated()
+{
+  MOZ_ASSERT(NS_IsMainThread());
+  ++sInnerOrOuterWindowCount;
+  return ++sInnerOrOuterWindowSerialCounter;
+}
+
+/* static */ void
+nsContentUtils::InnerOrOuterWindowDestroyed()
+{
+  MOZ_ASSERT(NS_IsMainThread());
+  MOZ_ASSERT(sInnerOrOuterWindowCount > 0);
+  --sInnerOrOuterWindowCount;
+}
--- a/dom/base/nsContentUtils.h
+++ b/dom/base/nsContentUtils.h
@ -3243,6 +3243,38 @@ public:

  static void AsyncPrecreateStringBundles();

+  static bool ContentIsLink(nsIContent* aContent);
+
+  static already_AddRefed<mozilla::dom::EventTarget>
+  TryGetTabChildGlobalAsEventTarget(nsISupports* aFrom);
+
+  static PopupControlState
+  PushPopupControlState(PopupControlState aState, bool aForce)
+  {
+    MOZ_ASSERT(NS_IsMainThread());
+    PopupControlState old = sPopupControlState;
+    if (aState < old || aForce) {
+      sPopupControlState = aState;
+    }
+    return old;
+  }
+
+  static void
+  PopPopupControlState(PopupControlState aState)
+  {
+    MOZ_ASSERT(NS_IsMainThread());
+    sPopupControlState = aState;
+  }
+
+  static PopupControlState GetPopupControlState() { return sPopupControlState; }
+
+  // Get a serial number for a newly created inner or outer window.
+  static uint32_t InnerOrOuterWindowCreated();
+  // Record that an inner or outer window has been destroyed.
+  static void InnerOrOuterWindowDestroyed();
+  // Get the current number of inner or outer windows.
+  static int32_t GetCurrentInnerOrOuterWindowCount() { return sInnerOrOuterWindowCount; }
+
 private:
  static bool InitializeEventTable();

@ -3431,6 +3463,11 @@ private:
 #endif
  static bool sDoNotTrackEnabled;
  static mozilla::LazyLogModule sDOMDumpLog;
+
+  static PopupControlState sPopupControlState;
+
+  static int32_t sInnerOrOuterWindowCount;
+  static uint32_t sInnerOrOuterWindowSerialCounter;
 };

 /* static */ inline
--- a/dom/base/nsDOMClassInfo.cpp
+++ b/dom/base/nsDOMClassInfo.cpp
@ -229,7 +229,6 @@ static inline nsresult
 SetParentToWindow(nsGlobalWindowInner *win, JSObject **parent)
 {
  MOZ_ASSERT(win);
-  MOZ_ASSERT(win->IsInnerWindow());
  *parent = win->FastGetGlobalJSObject();

  if (MOZ_UNLIKELY(!*parent)) {
@ -1029,12 +1028,13 @@ nsDOMConstructor::Create(const char16_t* aName,
  nsPIDOMWindowOuter* outerWindow = aOwner->GetOuterWindow();
  nsPIDOMWindowInner* currentInner =
    outerWindow ? outerWindow->GetCurrentInnerWindow() : aOwner;
-  if (!currentInner ||
-      (aOwner != currentInner &&
-       !nsContentUtils::CanCallerAccess(currentInner) &&
-       !(currentInner = aOwner)->IsInnerWindow())) {
+  if (!currentInner) {
    return NS_ERROR_DOM_SECURITY_ERR;
  }
+  if (aOwner != currentInner &&
+      !nsContentUtils::CanCallerAccess(currentInner)) {
+    currentInner = aOwner;
+  }

  bool constructable = aNameStruct && IsConstructable(aNameStruct);

--- a/dom/base/nsDOMMutationObserver.cpp
+++ b/dom/base/nsDOMMutationObserver.cpp
@ -816,7 +816,6 @@ nsDOMMutationObserver::Constructor(const mozilla::dom::GlobalObject& aGlobal,
    aRv.Throw(NS_ERROR_FAILURE);
    return nullptr;
  }
-  MOZ_ASSERT(window->IsInnerWindow());
  bool isChrome = nsContentUtils::IsChromeDoc(window->GetExtantDoc());
  RefPtr<nsDOMMutationObserver> observer =
    new nsDOMMutationObserver(window.forget(), aCb, isChrome);
--- a/dom/base/nsDOMWindowUtils.cpp
+++ b/dom/base/nsDOMWindowUtils.cpp
@ -212,7 +212,6 @@ nsDOMWindowUtils::nsDOMWindowUtils(nsGlobalWindowOuter *aWindow)
 {
  nsCOMPtr<nsISupports> supports = do_QueryObject(aWindow);
  mWindow = do_GetWeakReference(supports);
-  NS_ASSERTION(aWindow->IsOuterWindow(), "How did that happen?");
 }

 nsDOMWindowUtils::~nsDOMWindowUtils()
@ -2390,7 +2389,6 @@ nsDOMWindowUtils::GetOuterWindowID(uint64_t *aWindowID)
  nsCOMPtr<nsPIDOMWindowOuter> window = do_QueryReferent(mWindow);
  NS_ENSURE_STATE(window);

-  NS_ASSERTION(window->IsOuterWindow(), "How did that happen?");
  *aWindowID = window->WindowID();
  return NS_OK;
 }
@ -2401,7 +2399,6 @@ nsDOMWindowUtils::GetCurrentInnerWindowID(uint64_t *aWindowID)
  nsCOMPtr<nsPIDOMWindowOuter> window = do_QueryReferent(mWindow);
  NS_ENSURE_TRUE(window, NS_ERROR_NOT_AVAILABLE);

-  NS_ASSERTION(window->IsOuterWindow(), "How did that happen?");
  nsGlobalWindowInner* inner =
    nsGlobalWindowOuter::Cast(window)->GetCurrentInnerWindowInternal();
  if (!inner) {
--- a/dom/base/nsDocument.cpp
+++ b/dom/base/nsDocument.cpp
@ -1538,6 +1538,7 @@ nsIDocument::nsIDocument()
    mDidCallBeginLoad(false),
    mBufferingCSPViolations(false),
    mAllowPaymentRequest(false),
+    mEncodingMenuDisabled(false),
    mIsScopedStyleEnabled(eScopedStyle_Unknown),
    mCompatMode(eCompatibility_FullStandards),
    mReadyState(ReadyState::READYSTATE_UNINITIALIZED),
@ -5063,14 +5064,6 @@ nsIDocument::GetContainer() const
 void
 nsDocument::SetScriptGlobalObject(nsIScriptGlobalObject *aScriptGlobalObject)
 {
-#ifdef DEBUG
-  {
-    nsCOMPtr<nsPIDOMWindowInner> win(do_QueryInterface(aScriptGlobalObject));
-
-    NS_ASSERTION(!win || win->IsInnerWindow(),
-                 "Script global object must be an inner window!");
-  }
-#endif
  MOZ_ASSERT(aScriptGlobalObject || !mAnimationController ||
             mAnimationController->IsPausedByType(
               nsSMILTimeContainer::PAUSE_PAGEHIDE |
@ -10889,7 +10882,6 @@ nsIDocument::CreateTouch(nsGlobalWindowInner* aView,
                         float aRotationAngle,
                         float aForce)
 {
-  MOZ_ASSERT_IF(aView, aView->IsInnerWindow());
  RefPtr<Touch> touch = new Touch(aTarget,
                                  aIdentifier,
                                  aPageX, aPageY,
@ -14380,7 +14372,6 @@ nsIDocument::GetSelection(ErrorResult& aRv)
    return nullptr;
  }

-  NS_ASSERTION(window->IsInnerWindow(), "Should have inner window here!");
  if (!window->IsCurrentInnerWindow()) {
    return nullptr;
  }
--- a/dom/base/nsFocusManager.cpp
+++ b/dom/base/nsFocusManager.cpp
@ -1038,7 +1038,6 @@ nsFocusManager::WindowHidden(mozIDOMWindowProxy* aWindow)
    // not happen if nsIAppStartup::eForceQuit is used to quit, and can cause
    // a leak. So if the active window is being destroyed, call WindowLowered
    // directly.
-    NS_ASSERTION(mFocusedWindow->IsOuterWindow(), "outer window expected");
    if (mActiveWindow == mFocusedWindow || mActiveWindow == window)
      WindowLowered(mActiveWindow);
    else
--- a/dom/base/nsGlobalWindow.cpp
+++ b/dom/base/nsGlobalWindow.cpp
@ -1,832 +0,0 @@
-/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
-/* vim: set ts=8 sts=2 et sw=2 tw=80: */
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-#include "nsGlobalWindow.h"
-
-#include <algorithm>
-
-#include "mozilla/MemoryReporting.h"
-
-// Local Includes
-#include "Navigator.h"
-#include "nsContentSecurityManager.h"
-#include "nsScreen.h"
-#include "nsHistory.h"
-#include "nsDOMNavigationTiming.h"
-#include "nsIDOMStorageManager.h"
-#include "mozilla/dom/LocalStorage.h"
-#include "mozilla/dom/Storage.h"
-#include "mozilla/dom/IdleRequest.h"
-#include "mozilla/dom/Performance.h"
-#include "mozilla/dom/StorageEvent.h"
-#include "mozilla/dom/StorageEventBinding.h"
-#include "mozilla/dom/StorageNotifierService.h"
-#include "mozilla/dom/StorageUtils.h"
-#include "mozilla/dom/Timeout.h"
-#include "mozilla/dom/TimeoutHandler.h"
-#include "mozilla/dom/TimeoutManager.h"
-#include "mozilla/IntegerPrintfMacros.h"
-#if defined(MOZ_WIDGET_ANDROID)
-#include "mozilla/dom/WindowOrientationObserver.h"
-#endif
-#include "nsDOMOfflineResourceList.h"
-#include "nsError.h"
-#include "nsIIdleService.h"
-#include "nsISizeOfEventTarget.h"
-#include "nsDOMJSUtils.h"
-#include "nsArrayUtils.h"
-#include "nsIDOMWindowCollection.h"
-#include "nsDOMWindowList.h"
-#include "mozilla/dom/WakeLock.h"
-#include "mozilla/dom/power/PowerManagerService.h"
-#include "nsIDocShellTreeOwner.h"
-#include "nsIInterfaceRequestorUtils.h"
-#include "nsIPermissionManager.h"
-#include "nsIScriptContext.h"
-#include "nsIScriptTimeoutHandler.h"
-#include "nsITimeoutHandler.h"
-#include "nsIController.h"
-#include "nsScriptNameSpaceManager.h"
-#include "nsISlowScriptDebug.h"
-#include "nsWindowMemoryReporter.h"
-#include "nsWindowSizes.h"
-#include "WindowNamedPropertiesHandler.h"
-#include "nsFrameSelection.h"
-#include "nsNetUtil.h"
-#include "nsVariant.h"
-#include "nsPrintfCString.h"
-#include "mozilla/intl/LocaleService.h"
-
-// Helper Classes
-#include "nsJSUtils.h"
-#include "jsapi.h"              // for JSAutoRequest
-#include "jswrapper.h"
-#include "nsCharSeparatedTokenizer.h"
-#include "nsReadableUtils.h"
-#include "nsDOMClassInfo.h"
-#include "nsJSEnvironment.h"
-#include "mozilla/dom/ScriptSettings.h"
-#include "mozilla/Preferences.h"
-#include "mozilla/Likely.h"
-#include "mozilla/Sprintf.h"
-#include "mozilla/Unused.h"
-
-// Other Classes
-#include "mozilla/dom/BarProps.h"
-#include "nsContentCID.h"
-#include "nsLayoutStatics.h"
-#include "nsCCUncollectableMarker.h"
-#include "mozilla/dom/workers/Workers.h"
-#include "mozilla/dom/ToJSValue.h"
-#include "nsJSPrincipals.h"
-#include "mozilla/Attributes.h"
-#include "mozilla/Debug.h"
-#include "mozilla/EventListenerManager.h"
-#include "mozilla/EventStates.h"
-#include "mozilla/MouseEvents.h"
-#include "mozilla/ProcessHangMonitor.h"
-#include "mozilla/ThrottledEventQueue.h"
-#include "AudioChannelService.h"
-#include "nsAboutProtocolUtils.h"
-#include "nsCharTraits.h" // NS_IS_HIGH/LOW_SURROGATE
-#include "PostMessageEvent.h"
-#include "mozilla/dom/DocGroup.h"
-#include "mozilla/dom/TabGroup.h"
-
-// Interfaces Needed
-#include "nsIFrame.h"
-#include "nsCanvasFrame.h"
-#include "nsIWidget.h"
-#include "nsIWidgetListener.h"
-#include "nsIBaseWindow.h"
-#include "nsIDeviceSensors.h"
-#include "nsIContent.h"
-#include "nsIDocShell.h"
-#include "nsIDocCharset.h"
-#include "nsIDocument.h"
-#include "Crypto.h"
-#include "nsIDOMDocument.h"
-#include "nsIDOMElement.h"
-#include "nsIDOMEvent.h"
-#include "nsIDOMOfflineResourceList.h"
-#include "nsDOMString.h"
-#include "nsIEmbeddingSiteWindow.h"
-#include "nsThreadUtils.h"
-#include "nsILoadContext.h"
-#include "nsIPresShell.h"
-#include "nsIScrollableFrame.h"
-#include "nsView.h"
-#include "nsViewManager.h"
-#include "nsISelectionController.h"
-#include "nsISelection.h"
-#include "nsIPrompt.h"
-#include "nsIPromptService.h"
-#include "nsIPromptFactory.h"
-#include "nsIAddonPolicyService.h"
-#include "nsIWritablePropertyBag2.h"
-#include "nsIWebNavigation.h"
-#include "nsIWebBrowserChrome.h"
-#include "nsIWebBrowserFind.h"  // For window.find()
-#include "nsIWindowMediator.h"  // For window.find()
-#include "nsComputedDOMStyle.h"
-#include "nsDOMCID.h"
-#include "nsDOMWindowUtils.h"
-#include "nsIWindowWatcher.h"
-#include "nsPIWindowWatcher.h"
-#include "nsIContentViewer.h"
-#include "nsIScriptError.h"
-#include "nsIControllers.h"
-#include "nsIControllerContext.h"
-#include "nsGlobalWindowCommands.h"
-#include "nsQueryObject.h"
-#include "nsContentUtils.h"
-#include "nsCSSProps.h"
-#include "nsIDOMFileList.h"
-#include "nsIURIFixup.h"
-#ifndef DEBUG
-#include "nsIAppStartup.h"
-#include "nsToolkitCompsCID.h"
-#endif
-#include "nsCDefaultURIFixup.h"
-#include "mozilla/EventDispatcher.h"
-#include "mozilla/EventStateManager.h"
-#include "nsIObserverService.h"
-#include "nsFocusManager.h"
-#include "nsIXULWindow.h"
-#include "nsITimedChannel.h"
-#include "nsServiceManagerUtils.h"
-#ifdef MOZ_XUL
-#include "nsIDOMXULControlElement.h"
-#include "nsMenuPopupFrame.h"
-#endif
-#include "mozilla/dom/CustomEvent.h"
-#include "nsIJARChannel.h"
-#include "nsIScreenManager.h"
-#include "nsIEffectiveTLDService.h"
-
-#include "xpcprivate.h"
-
-#ifdef NS_PRINTING
-#include "nsIPrintSettings.h"
-#include "nsIPrintSettingsService.h"
-#include "nsIWebBrowserPrint.h"
-#endif
-
-#include "nsWindowRoot.h"
-#include "nsNetCID.h"
-#include "nsIArray.h"
-
-// XXX An unfortunate dependency exists here (two XUL files).
-#include "nsIDOMXULDocument.h"
-#include "nsIDOMXULCommandDispatcher.h"
-
-#include "nsBindingManager.h"
-#include "nsXBLService.h"
-
-// used for popup blocking, needs to be converted to something
-// belonging to the back-end like nsIContentPolicy
-#include "nsIPopupWindowManager.h"
-
-#include "nsIDragService.h"
-#include "mozilla/dom/Element.h"
-#include "mozilla/dom/Selection.h"
-#include "nsFrameLoader.h"
-#include "nsISupportsPrimitives.h"
-#include "nsXPCOMCID.h"
-#include "mozilla/Logging.h"
-#include "prenv.h"
-
-#include "mozilla/dom/IDBFactory.h"
-#include "mozilla/dom/MessageChannel.h"
-#include "mozilla/dom/Promise.h"
-
-#include "mozilla/dom/Gamepad.h"
-#include "mozilla/dom/GamepadManager.h"
-
-#include "gfxVR.h"
-#include "mozilla/dom/VRDisplay.h"
-#include "mozilla/dom/VRDisplayEvent.h"
-#include "mozilla/dom/VRDisplayEventBinding.h"
-#include "mozilla/dom/VREventObserver.h"
-
-#include "nsRefreshDriver.h"
-#include "Layers.h"
-
-#include "mozilla/AddonPathService.h"
-#include "mozilla/BasePrincipal.h"
-#include "mozilla/Services.h"
-#include "mozilla/Telemetry.h"
-#include "mozilla/dom/Location.h"
-#include "nsHTMLDocument.h"
-#include "nsWrapperCacheInlines.h"
-#include "mozilla/DOMEventTargetHelper.h"
-#include "prrng.h"
-#include "nsSandboxFlags.h"
-#include "TimeChangeObserver.h"
-#include "mozilla/dom/AudioContext.h"
-#include "mozilla/dom/BrowserElementDictionariesBinding.h"
-#include "mozilla/dom/cache/CacheStorage.h"
-#include "mozilla/dom/Console.h"
-#include "mozilla/dom/Fetch.h"
-#include "mozilla/dom/FunctionBinding.h"
-#include "mozilla/dom/HashChangeEvent.h"
-#include "mozilla/dom/IntlUtils.h"
-#include "mozilla/dom/MozSelfSupportBinding.h"
-#include "mozilla/dom/PopStateEvent.h"
-#include "mozilla/dom/PopupBlockedEvent.h"
-#include "mozilla/dom/PrimitiveConversions.h"
-#include "mozilla/dom/WindowBinding.h"
-#include "nsITabChild.h"
-#include "mozilla/dom/MediaQueryList.h"
-#include "mozilla/dom/ScriptSettings.h"
-#include "mozilla/dom/NavigatorBinding.h"
-#include "mozilla/dom/ImageBitmap.h"
-#include "mozilla/dom/ImageBitmapBinding.h"
-#include "mozilla/dom/ServiceWorkerRegistration.h"
-#include "mozilla/dom/U2F.h"
-#include "mozilla/dom/WebIDLGlobalNameHash.h"
-#include "mozilla/dom/Worklet.h"
-#ifdef HAVE_SIDEBAR
-#include "mozilla/dom/ExternalBinding.h"
-#endif
-
-#ifdef MOZ_WEBSPEECH
-#include "mozilla/dom/SpeechSynthesis.h"
-#endif
-
-// Apple system headers seem to have a check() macro.  <sigh>
-#ifdef check
-class nsIScriptTimeoutHandler;
-#undef check
-#endif // check
-#include "AccessCheck.h"
-
-#ifdef ANDROID
-#include <android/log.h>
-#endif
-
-#ifdef XP_WIN
-#include <process.h>
-#define getpid _getpid
-#else
-#include <unistd.h> // for getpid()
-#endif
-
-static const char kStorageEnabled[] = "dom.storage.enabled";
-
-using namespace mozilla;
-using namespace mozilla::dom;
-using namespace mozilla::dom::ipc;
-using mozilla::BasePrincipal;
-using mozilla::OriginAttributes;
-using mozilla::TimeStamp;
-using mozilla::TimeDuration;
-using mozilla::dom::cache::CacheStorage;
-
-static LazyLogModule gDOMLeakPRLog("DOMLeak");
-
-static int32_t              gRefCnt                           = 0;
-static int32_t              gOpenPopupSpamCount               = 0;
-static PopupControlState    gPopupControlState                = openAbused;
-static bool                 gMouseDown                        = false;
-static bool                 gDragServiceDisabled              = false;
-static FILE                *gDumpFile                         = nullptr;
-static uint32_t             gSerialCounter                    = 0;
-static bool                 gIdleObserversAPIFuzzTimeDisabled = false;
-
-#ifdef DEBUG_jst
-int32_t gTimeoutCnt                                    = 0;
-#endif
-
-#if defined(DEBUG_bryner) || defined(DEBUG_chb)
-#define DEBUG_PAGE_CACHE
-#endif
-
-#define DOM_TOUCH_LISTENER_ADDED "dom-touch-listener-added"
-
-#define MEMORY_PRESSURE_OBSERVER_TOPIC "memory-pressure"
-
-// The interval at which we execute idle callbacks
-static uint32_t gThrottledIdlePeriodLength;
-
-#define DEFAULT_THROTTLED_IDLE_PERIOD_LENGTH 10000
-
-// CIDs
-static NS_DEFINE_CID(kXULControllersCID, NS_XULCONTROLLERS_CID);
-
-#define NETWORK_UPLOAD_EVENT_NAME     NS_LITERAL_STRING("moznetworkupload")
-#define NETWORK_DOWNLOAD_EVENT_NAME   NS_LITERAL_STRING("moznetworkdownload")
-
-namespace mozilla {
-namespace dom {
-extern uint64_t
-NextWindowID();
-} // namespace dom
-} // namespace mozilla
-
-template<class T>
-nsPIDOMWindow<T>::nsPIDOMWindow(nsPIDOMWindowOuter *aOuterWindow)
-: mFrameElement(nullptr), mDocShell(nullptr), mModalStateDepth(0),
-  mMutationBits(0), mActivePeerConnections(0), mIsDocumentLoaded(false),
-  mIsHandlingResizeEvent(false), mIsInnerWindow(aOuterWindow != nullptr),
-  mMayHavePaintEventListener(false), mMayHaveTouchEventListener(false),
-  mMayHaveSelectionChangeEventListener(false),
-  mMayHaveMouseEnterLeaveEventListener(false),
-  mMayHavePointerEnterLeaveEventListener(false),
-  mInnerObjectsFreed(false),
-  mIsActive(false), mIsBackground(false),
-  mMediaSuspend(
-    Preferences::GetBool("media.block-autoplay-until-in-foreground", true) &&
-    Preferences::GetBool("media.autoplay.enabled", true) ?
-      nsISuspendedTypes::SUSPENDED_BLOCK : nsISuspendedTypes::NONE_SUSPENDED),
-  mAudioMuted(false), mAudioVolume(1.0), mAudioCaptured(false),
-  mDesktopModeViewport(false), mIsRootOuterWindow(false), mInnerWindow(nullptr),
-  mOuterWindow(aOuterWindow),
-  // Make sure no actual window ends up with mWindowID == 0
-  mWindowID(NextWindowID()), mHasNotifiedGlobalCreated(false),
-  mMarkedCCGeneration(0), mServiceWorkersTestingEnabled(false),
-  mLargeAllocStatus(LargeAllocStatus::NONE),
-  mHasTriedToCacheTopInnerWindow(false),
-  mNumOfIndexedDBDatabases(0),
-  mNumOfOpenWebSockets(0)
-{
-  if (aOuterWindow) {
-    mTimeoutManager =
-      MakeUnique<mozilla::dom::TimeoutManager>(*nsGlobalWindowInner::Cast(AsInner()));
-  }
-}
-
-template<class T>
-nsPIDOMWindow<T>::~nsPIDOMWindow() {}
-
-PopupControlState
-PushPopupControlState(PopupControlState aState, bool aForce)
-{
-  MOZ_ASSERT(NS_IsMainThread());
-
-  PopupControlState oldState = gPopupControlState;
-
-  if (aState < gPopupControlState || aForce) {
-    gPopupControlState = aState;
-  }
-
-  return oldState;
-}
-
-void
-PopPopupControlState(PopupControlState aState)
-{
-  MOZ_ASSERT(NS_IsMainThread());
-
-  gPopupControlState = aState;
-}
-
-// We need certain special behavior for remote XUL whitelisted domains, but we
-// don't want that behavior to take effect in automation, because we whitelist
-// all the mochitest domains. So we need to check a pref here.
-static bool
-TreatAsRemoteXUL(nsIPrincipal* aPrincipal)
-{
-  MOZ_ASSERT(!nsContentUtils::IsSystemPrincipal(aPrincipal));
-  return nsContentUtils::AllowXULXBLForPrincipal(aPrincipal) &&
-         !Preferences::GetBool("dom.use_xbl_scopes_for_remote_xul", false);
-}
-
-static bool
-EnablePrivilege(JSContext* cx, unsigned argc, JS::Value* vp)
-{
-  Telemetry::Accumulate(Telemetry::ENABLE_PRIVILEGE_EVER_CALLED, true);
-  return xpc::EnableUniversalXPConnect(cx);
-}
-
-static const JSFunctionSpec EnablePrivilegeSpec[] = {
-  JS_FN("enablePrivilege", EnablePrivilege, 1, 0),
-  JS_FS_END
-};
-
-static bool
-InitializeLegacyNetscapeObject(JSContext* aCx, JS::Handle<JSObject*> aGlobal)
-{
-  JSAutoCompartment ac(aCx, aGlobal);
-
-  // Note: MathJax depends on window.netscape being exposed. See bug 791526.
-  JS::Rooted<JSObject*> obj(aCx);
-  obj = JS_DefineObject(aCx, aGlobal, "netscape", nullptr);
-  NS_ENSURE_TRUE(obj, false);
-
-  obj = JS_DefineObject(aCx, obj, "security", nullptr);
-  NS_ENSURE_TRUE(obj, false);
-
-  // We hide enablePrivilege behind a pref because it has been altered in a
-  // way that makes it fundamentally insecure to use in production. Mozilla
-  // uses this pref during automated testing to support legacy test code that
-  // uses enablePrivilege. If you're not doing test automation, you _must_ not
-  // flip this pref, or you will be exposing all your users to security
-  // vulnerabilities.
-  if (!xpc::IsInAutomation()) {
-    return true;
-  }
-
-  /* Define PrivilegeManager object with the necessary "static" methods. */
-  obj = JS_DefineObject(aCx, obj, "PrivilegeManager", nullptr);
-  NS_ENSURE_TRUE(obj, false);
-
-  return JS_DefineFunctions(aCx, obj, EnablePrivilegeSpec);
-}
-
-static JS::CompartmentCreationOptions&
-SelectZoneGroup(nsGlobalWindowInner* aNewInner,
-                JS::CompartmentCreationOptions& aOptions)
-{
-  JS::CompartmentCreationOptions options;
-
-  if (aNewInner->GetOuterWindow()) {
-    nsGlobalWindowOuter *top = aNewInner->GetTopInternal();
-
-    // If we have a top-level window, use its zone (and zone group).
-    if (top && top->GetGlobalJSObject()) {
-      return aOptions.setExistingZone(top->GetGlobalJSObject());
-    }
-  }
-
-  // If we're in the parent process, don't bother with zone groups.
-  if (XRE_IsParentProcess()) {
-    return aOptions.setNewZoneInSystemZoneGroup();
-  }
-
-  // Otherwise, find a zone group from the TabGroup. Typically we only have to
-  // go through one iteration of this loop.
-  RefPtr<TabGroup> tabGroup = aNewInner->TabGroup();
-  for (nsPIDOMWindowOuter* outer : tabGroup->GetWindows()) {
-    nsGlobalWindowOuter* window = nsGlobalWindowOuter::Cast(outer);
-    if (JSObject* global = window->GetGlobalJSObject()) {
-      return aOptions.setNewZoneInExistingZoneGroup(global);
-    }
-  }
-
-  return aOptions.setNewZoneInNewZoneGroup();
-}
-
-/**
- * Create a new global object that will be used for an inner window.
- * Return the native global and an nsISupports 'holder' that can be used
- * to manage the lifetime of it.
- */
-static nsresult
-CreateNativeGlobalForInner(JSContext* aCx,
-                           nsGlobalWindowInner* aNewInner,
-                           nsIURI* aURI,
-                           nsIPrincipal* aPrincipal,
-                           JS::MutableHandle<JSObject*> aGlobal,
-                           bool aIsSecureContext)
-{
-  MOZ_ASSERT(aCx);
-  MOZ_ASSERT(aNewInner);
-  MOZ_ASSERT(aNewInner->IsInnerWindow());
-  MOZ_ASSERT(aPrincipal);
-
-  // DOMWindow with nsEP is not supported, we have to make sure
-  // no one creates one accidentally.
-  nsCOMPtr<nsIExpandedPrincipal> nsEP = do_QueryInterface(aPrincipal);
-  MOZ_RELEASE_ASSERT(!nsEP, "DOMWindow with nsEP is not supported");
-
-  JS::CompartmentOptions options;
-
-  SelectZoneGroup(aNewInner, options.creationOptions());
-
-  // Sometimes add-ons load their own XUL windows, either as separate top-level
-  // windows or inside a browser element. In such cases we want to tag the
-  // window's compartment with the add-on ID. See bug 1092156.
-  if (nsContentUtils::IsSystemPrincipal(aPrincipal)) {
-    options.creationOptions().setAddonId(MapURIToAddonID(aURI));
-  }
-
-  options.creationOptions().setSecureContext(aIsSecureContext);
-
-  xpc::InitGlobalObjectOptions(options, aPrincipal);
-
-  // Determine if we need the Components object.
-  bool needComponents = nsContentUtils::IsSystemPrincipal(aPrincipal) ||
-                        TreatAsRemoteXUL(aPrincipal);
-  uint32_t flags = needComponents ? 0 : xpc::OMIT_COMPONENTS_OBJECT;
-  flags |= xpc::DONT_FIRE_ONNEWGLOBALHOOK;
-
-  if (!WindowBinding::Wrap(aCx, aNewInner, aNewInner, options,
-                           nsJSPrincipals::get(aPrincipal), false, aGlobal) ||
-      !xpc::InitGlobalObject(aCx, aGlobal, flags)) {
-    return NS_ERROR_FAILURE;
-  }
-
-  MOZ_ASSERT(aNewInner->GetWrapperPreserveColor() == aGlobal);
-
-  // Set the location information for the new global, so that tools like
-  // about:memory may use that information
-  xpc::SetLocationForGlobal(aGlobal, aURI);
-
-  if (!InitializeLegacyNetscapeObject(aCx, aGlobal)) {
-    return NS_ERROR_FAILURE;
-  }
-
-  return NS_OK;
-}
-
-static
-already_AddRefed<EventTarget>
-TryGetTabChildGlobalAsEventTarget(nsISupports *aFrom)
-{
-  nsCOMPtr<nsIFrameLoaderOwner> frameLoaderOwner = do_QueryInterface(aFrom);
-  if (!frameLoaderOwner) {
-    return nullptr;
-  }
-
-  RefPtr<nsFrameLoader> frameLoader = frameLoaderOwner->GetFrameLoader();
-  if (!frameLoader) {
-    return nullptr;
-  }
-
-  nsCOMPtr<EventTarget> target = frameLoader->GetTabChildGlobalAsEventTarget();
-  return target.forget();
-}
-
-template <class T>
-nsIURI*
-nsPIDOMWindow<T>::GetDocumentURI() const
-{
-  return mDoc ? mDoc->GetDocumentURI() : mDocumentURI.get();
-}
-
-template <class T>
-nsIURI*
-nsPIDOMWindow<T>::GetDocBaseURI() const
-{
-  return mDoc ? mDoc->GetDocBaseURI() : mDocBaseURI.get();
-}
-
-template <class T>
-void
-nsPIDOMWindow<T>::MaybeCreateDoc()
-{
-  MOZ_ASSERT(!mDoc);
-  if (nsIDocShell* docShell = GetDocShell()) {
-    // Note that |document| here is the same thing as our mDoc, but we
-    // don't have to explicitly set the member variable because the docshell
-    // has already called SetNewDocument().
-    nsCOMPtr<nsIDocument> document = docShell->GetDocument();
-    Unused << document;
-  }
-}
-
-// Try to match compartments that are not web content by matching compartments
-// with principals that are either the system principal or an expanded principal.
-// This may not return true for all non-web-content compartments.
-struct BrowserCompartmentMatcher : public js::CompartmentFilter {
-  bool match(JSCompartment* aC) const override
-    {
-      nsCOMPtr<nsIPrincipal> pc = nsJSPrincipals::get(JS_GetCompartmentPrincipals(aC));
-      return nsContentUtils::IsSystemOrExpandedPrincipal(pc);
-    }
-};
-
-class WindowDestroyedEvent final : public Runnable
-{
-public:
-  WindowDestroyedEvent(nsGlobalWindowInner* aWindow, uint64_t aID, const char* aTopic)
-    : mozilla::Runnable("WindowDestroyedEvent")
-    , mID(aID)
-    , mPhase(Phase::Destroying)
-    , mTopic(aTopic)
-    , mIsInnerWindow(true)
-  {
-    mWindow = do_GetWeakReference(aWindow);
-  }
-  WindowDestroyedEvent(nsGlobalWindowOuter* aWindow, uint64_t aID, const char* aTopic)
-    : mozilla::Runnable("WindowDestroyedEvent")
-    , mID(aID)
-    , mPhase(Phase::Destroying)
-    , mTopic(aTopic)
-    , mIsInnerWindow(false)
-  {
-    mWindow = do_GetWeakReference(aWindow);
-  }
-
-  enum class Phase
-  {
-    Destroying,
-    Nuking
-  };
-
-  NS_IMETHOD Run() override
-  {
-    AUTO_PROFILER_LABEL("WindowDestroyedEvent::Run", OTHER);
-
-    nsCOMPtr<nsIObserverService> observerService =
-      services::GetObserverService();
-    if (!observerService) {
-      return NS_OK;
-    }
-
-    nsCOMPtr<nsISupportsPRUint64> wrapper =
-      do_CreateInstance(NS_SUPPORTS_PRUINT64_CONTRACTID);
-    if (wrapper) {
-      wrapper->SetData(mID);
-      observerService->NotifyObservers(wrapper, mTopic.get(), nullptr);
-    }
-
-    switch (mPhase) {
-      case Phase::Destroying:
-      {
-        bool skipNukeCrossCompartment = false;
-#ifndef DEBUG
-        nsCOMPtr<nsIAppStartup> appStartup =
-          do_GetService(NS_APPSTARTUP_CONTRACTID);
-
-        if (appStartup) {
-          appStartup->GetShuttingDown(&skipNukeCrossCompartment);
-        }
-#endif
-
-        if (!skipNukeCrossCompartment) {
-          // The compartment nuking phase might be too expensive, so do that
-          // part off of idle dispatch.
-
-          // For the compartment nuking phase, we dispatch either an
-          // inner-window-nuked or an outer-window-nuked notification.
-          // This will allow tests to wait for compartment nuking to happen.
-          if (mTopic.EqualsLiteral("inner-window-destroyed")) {
-            mTopic.AssignLiteral("inner-window-nuked");
-          } else if (mTopic.EqualsLiteral("outer-window-destroyed")) {
-            mTopic.AssignLiteral("outer-window-nuked");
-          }
-          mPhase = Phase::Nuking;
-
-          nsCOMPtr<nsIRunnable> copy(this);
-          NS_IdleDispatchToCurrentThread(copy.forget(), 1000);
-        }
-      }
-      break;
-
-      case Phase::Nuking:
-      {
-        nsCOMPtr<nsISupports> window = do_QueryReferent(mWindow);
-        if (window) {
-          nsGlobalWindowInner* currentInner;
-          if (mIsInnerWindow) {
-            currentInner = nsGlobalWindowInner::FromSupports(window);
-          } else {
-            nsGlobalWindowOuter* outer = nsGlobalWindowOuter::FromSupports(window);
-            currentInner = outer->GetCurrentInnerWindowInternal();
-          }
-          NS_ENSURE_TRUE(currentInner, NS_OK);
-
-          AutoSafeJSContext cx;
-          JS::Rooted<JSObject*> obj(cx, currentInner->FastGetGlobalJSObject());
-          if (obj && !js::IsSystemCompartment(js::GetObjectCompartment(obj))) {
-            JSCompartment* cpt = js::GetObjectCompartment(obj);
-            nsCOMPtr<nsIPrincipal> pc = nsJSPrincipals::get(JS_GetCompartmentPrincipals(cpt));
-
-            if (BasePrincipal::Cast(pc)->AddonPolicy()) {
-              // We want to nuke all references to the add-on compartment.
-              xpc::NukeAllWrappersForCompartment(cx, cpt,
-                                                 mIsInnerWindow ? js::DontNukeWindowReferences
-                                                                : js::NukeWindowReferences);
-            } else {
-              // We only want to nuke wrappers for the chrome->content case
-              js::NukeCrossCompartmentWrappers(cx, BrowserCompartmentMatcher(), cpt,
-                                               mIsInnerWindow ? js::DontNukeWindowReferences
-                                                              : js::NukeWindowReferences,
-                                               js::NukeIncomingReferences);
-            }
-          }
-        }
-      }
-      break;
-    }
-
-    return NS_OK;
-  }
-
-private:
-  uint64_t mID;
-  Phase mPhase;
-  nsCString mTopic;
-  nsWeakPtr mWindow;
-  bool mIsInnerWindow;
-};
-
-class ChildCommandDispatcher : public Runnable
-{
-public:
-  ChildCommandDispatcher(nsPIWindowRoot* aRoot,
-                         nsITabChild* aTabChild,
-                         const nsAString& aAction)
-    : mozilla::Runnable("ChildCommandDispatcher")
-    , mRoot(aRoot)
-    , mTabChild(aTabChild)
-    , mAction(aAction)
-  {
-  }
-
-  NS_IMETHOD Run() override
-  {
-    nsTArray<nsCString> enabledCommands, disabledCommands;
-    mRoot->GetEnabledDisabledCommands(enabledCommands, disabledCommands);
-    if (enabledCommands.Length() || disabledCommands.Length()) {
-      mTabChild->EnableDisableCommands(mAction, enabledCommands, disabledCommands);
-    }
-
-    return NS_OK;
-  }
-
-private:
-  nsCOMPtr<nsPIWindowRoot>             mRoot;
-  nsCOMPtr<nsITabChild>                mTabChild;
-  nsString                             mAction;
-};
-
-class CommandDispatcher : public Runnable
-{
-public:
-  CommandDispatcher(nsIDOMXULCommandDispatcher* aDispatcher,
-                    const nsAString& aAction)
-    : mozilla::Runnable("CommandDispatcher")
-    , mDispatcher(aDispatcher)
-    , mAction(aAction)
-  {
-  }
-
-  NS_IMETHOD Run() override
-  {
-    return mDispatcher->UpdateCommands(mAction);
-  }
-
-  nsCOMPtr<nsIDOMXULCommandDispatcher> mDispatcher;
-  nsString                             mAction;
-};
-
-static bool IsLink(nsIContent* aContent)
-{
-  return aContent && (aContent->IsHTMLElement(nsGkAtoms::a) ||
-                      aContent->AttrValueIs(kNameSpaceID_XLink, nsGkAtoms::type,
-                                            nsGkAtoms::simple, eCaseMatters));
-}
-
-static bool ShouldShowFocusRingIfFocusedByMouse(nsIContent* aNode)
-{
-  if (!aNode) {
-    return true;
-  }
-  return !IsLink(aNode) &&
-    !aNode->IsAnyOfHTMLElements(nsGkAtoms::video, nsGkAtoms::audio);
-}
-
-static bool
-IsInterval(const Optional<int32_t>& aTimeout, int32_t& aResultTimeout)
-{
-  if (aTimeout.WasPassed()) {
-    aResultTimeout = aTimeout.Value();
-    return true;
-  }
-
-  // If no interval was specified, treat this like a timeout, to avoid setting
-  // an interval of 0 milliseconds.
-  aResultTimeout = 0;
-  return false;
-}
-
-template<typename T>
-mozilla::dom::DocGroup*
-nsPIDOMWindow<T>::GetDocGroup() const
-{
-  nsIDocument* doc = GetExtantDoc();
-  if (doc) {
-    return doc->GetDocGroup();
-  }
-  return nullptr;
-}
-
-static void
-EnsurePrefCaches()
-{
-  static bool sFirstTime = true;
-  if (sFirstTime) {
-    TimeoutManager::Initialize();
-    Preferences::AddBoolVarCache(&gIdleObserversAPIFuzzTimeDisabled,
-                                 "dom.idle-observers-api.fuzz_time.disabled",
-                                 false);
-
-    Preferences::AddUintVarCache(&gThrottledIdlePeriodLength,
-                                 "dom.idle_period.throttled_length",
-                                 DEFAULT_THROTTLED_IDLE_PERIOD_LENGTH);
-    sFirstTime = false;
-  }
-}
-
-// Include the implementations for the inner and outer windows respectively.
-#include "nsGlobalWindowOuter.cpp"
-#include "nsGlobalWindowInner.cpp"
-
-template class nsPIDOMWindow<mozIDOMWindowProxy>;
-template class nsPIDOMWindow<mozIDOMWindow>;
--- a/dom/base/nsGlobalWindow.h
+++ b/dom/base/nsGlobalWindow.h
@ -7,24 +7,6 @@
 #ifndef nsGlobalWindow_h___
 #define nsGlobalWindow_h___

-// XXX(nika): Figure out where to put this?
-#define DEFAULT_HOME_PAGE "www.mozilla.org"
-#define PREF_BROWSER_STARTUP_HOMEPAGE "browser.startup.homepage"
-
-// Amount of time allowed between alert/prompt/confirm before enabling
-// the stop dialog checkbox.
-#define DEFAULT_SUCCESSIVE_DIALOG_TIME_LIMIT 3 // 3 sec
-
-// Maximum number of successive dialogs before we prompt users to disable
-// dialogs for this window.
-#define MAX_SUCCESSIVE_DIALOG_COUNT 5
-
-// Idle fuzz time upper limit
-#define MAX_IDLE_FUZZ_TIME_MS 90000
-
-// Min idle notification time in seconds.
-#define MIN_IDLE_NOTIFICATION_TIME_S 1
-
 // NOTE: This is so that I can rewrite the includes in a separate patch.
 // Specificially I don't think I want to change this until I've moved everything
 // to mozilla/dom/Window.h and mozilla/dom/WindowProxy.h.
--- a/dom/base/nsGlobalWindowInner.cpp
+++ b/dom/base/nsGlobalWindowInner.cpp
--- a/dom/base/nsGlobalWindowInner.h
+++ b/dom/base/nsGlobalWindowInner.h
@ -192,27 +192,17 @@ ImplCycleCollectionTraverse(nsCycleCollectionTraversalCallback& aCallback,
  CycleCollectionNoteChild(aCallback, aField.mIdleObserver.get(), aName, aFlags);
 }

-// NOTE: Currently this file, despite being named mozilla/dom/Window.h, exports
-// the class nsGlobalWindowInner. It will be renamed in the future to
-// mozilla::dom::Window.
-
 //*****************************************************************************
-// nsGlobalWindow: Global Object for Scripting
+// nsGlobalWindowInner: Global Object for Scripting
 //*****************************************************************************
-// Beware that all scriptable interfaces implemented by
-// nsGlobalWindow will be reachable from JS, if you make this class
-// implement new interfaces you better know what you're
-// doing. Security wise this is very sensitive code. --
-// jst@netscape.com

-// nsGlobalWindow inherits PRCList for maintaining a list of all inner
-// windows still in memory for any given outer window. This list is
-// needed to ensure that mOuterWindow doesn't end up dangling. The
-// nature of PRCList means that the window itself is always in the
-// list, and an outer window's list will also contain all inner window
-// objects that are still in memory (and in reality all inner window
-// object's lists also contain its outer and all other inner windows
-// belonging to the same outer window, but that's an unimportant
+// nsGlobalWindowInner inherits PRCList for maintaining a list of all inner
+// windows still in memory for any given outer window. This list is needed to
+// ensure that mOuterWindow doesn't end up dangling. The nature of PRCList means
+// that the window itself is always in the list, and an outer window's list will
+// also contain all inner window objects that are still in memory (and in
+// reality all inner window object's lists also contain its outer and all other
+// inner windows belonging to the same outer window, but that's an unimportant
 // side effect of inheriting PRCList).

 class nsGlobalWindowInner : public mozilla::dom::EventTarget,
@ -262,8 +252,6 @@ public:

    nsGlobalWindowInner* innerWindow =
      sInnerWindowsById->Get(aInnerWindowID);
-    MOZ_ASSERT(!innerWindow || innerWindow->IsInnerWindow(),
-                "Outer window in sInnerWindowsById?");
    return innerWindow;
  }

@ -291,7 +279,7 @@ public:
  // nsWrapperCache
  virtual JSObject *WrapObject(JSContext *cx, JS::Handle<JSObject*> aGivenProto) override
  {
-    return IsInnerWindow() || AsOuter()->EnsureInnerWindow() ? GetWrapper() : nullptr;
+    return GetWrapper();
  }

  // nsIGlobalJSObjectHolder
@ -348,22 +336,10 @@ public:
  virtual nsPIDOMWindowOuter* GetPrivateRoot() override;

  // Outer windows only.
-  virtual void ActivateOrDeactivate(bool aActivate) override;
-  virtual void SetActive(bool aActive) override;
  virtual bool IsTopLevelWindowActive() override;
-  virtual void SetIsBackground(bool aIsBackground) override;
-  virtual void SetChromeEventHandler(mozilla::dom::EventTarget* aChromeEventHandler) override;

-  // Outer windows only.
-  virtual void SetInitialPrincipalToSubject() override;
-
-  virtual PopupControlState PushPopupControlState(PopupControlState state, bool aForce) const override;
-  virtual void PopPopupControlState(PopupControlState state) const override;
  virtual PopupControlState GetPopupControlState() const override;

-  virtual already_AddRefed<nsISupports> SaveWindowState() override;
-  virtual nsresult RestoreWindowState(nsISupports *aState) override;
-
  void Suspend();
  void Resume();
  virtual bool IsSuspended() const override;
@ -383,33 +359,14 @@ public:
  virtual void SetOpenerWindow(nsPIDOMWindowOuter* aOpener,
                               bool aOriginalOpener) override;

-  // Outer windows only.
-  virtual void EnsureSizeAndPositionUpToDate() override;
-
-  virtual void EnterModalState() override;
-  virtual void LeaveModalState() override;
-
-  // Outer windows only.
-  virtual bool CanClose() override;
-  virtual void ForceClose() override;
-
  virtual void MaybeUpdateTouchState() override;

-  // Outer windows only.
-  virtual bool DispatchCustomEvent(const nsAString& aEventName) override;
-
  // Inner windows only.
  void RefreshCompartmentPrincipal();

  // For accessing protected field mFullScreen
  friend class FullscreenTransitionTask;

-  // Outer windows only.
-  virtual nsresult SetFullscreenInternal(
-    FullscreenReason aReason, bool aIsFullscreen) override final;
-  virtual void FullscreenWillChange(bool aIsFullscreen) override final;
-  virtual void FinishFullscreenChange(bool aIsFullscreen) override final;
-
  // Inner windows only.
  virtual void SetHasGamepadEventListener(bool aHasGamepad = true) override;
  void NotifyVREventListenerAdded();
@ -444,7 +401,6 @@ public:
  void GetOwnPropertyNames(JSContext* aCx, JS::AutoIdVector& aNames,
                           bool aEnumerableOnly, mozilla::ErrorResult& aRv);

-  already_AddRefed<nsPIDOMWindowOuter> GetTop() override;
  nsPIDOMWindowOuter* GetScriptableTop() override;
  inline nsGlobalWindowOuter *GetTopInternal();

@ -475,11 +431,6 @@ public:

  nsGlobalWindowOuter *GetOuterWindowInternal() const;

-  bool IsCreatingInnerWindow() const
-  {
-    return mCreatingInnerWindow;
-  }
-
  bool IsChromeWindow() const
  {
    return mIsChrome;
@ -538,13 +489,8 @@ public:
  virtual void EnableTimeChangeNotifications() override;
  virtual void DisableTimeChangeNotifications() override;

-  virtual nsresult SetArguments(nsIArray* aArguments) override;
-
  bool IsClosedOrClosing() {
-    return (mIsClosed ||
-            mInClose ||
-            mHavePendingClose ||
-            mCleanedUp);
+    return mCleanedUp;
  }

  bool
@ -553,12 +499,6 @@ public:
    return mCleanedUp;
  }

-  virtual void
-  FirePopupBlockedEvent(nsIDocument* aDoc,
-                        nsIURI* aPopupURI,
-                        const nsAString& aPopupWindowName,
-                        const nsAString& aPopupWindowFeatures) override;
-
  virtual uint32_t GetSerial() override {
    return mSerial;
  }
@ -575,11 +515,6 @@ public:
  bool ContainsIdleObserver(nsIIdleObserver* aIdleObserver, uint32_t timeInS);
  void HandleIdleObserverCallback();

-  void AllowScriptsToClose()
-  {
-    mAllowScriptsToClose = true;
-  }
-
  enum SlowScriptResponse {
    ContinueSlowScript = 0,
    ContinueSlowScriptAndKeepNotifying,
@ -707,7 +642,6 @@ public:
  void Close(mozilla::ErrorResult& aError);
  nsresult Close() override;
  bool GetClosed(mozilla::ErrorResult& aError);
-  bool Closed() override;
  void Stop(mozilla::ErrorResult& aError);
  void Focus(mozilla::ErrorResult& aError);
  nsresult Focus() override;
@ -716,8 +650,6 @@ public:
  already_AddRefed<nsPIDOMWindowOuter> GetFrames(mozilla::ErrorResult& aError);
  uint32_t Length();
  already_AddRefed<nsPIDOMWindowOuter> GetTop(mozilla::ErrorResult& aError);
-
-  nsresult GetPrompter(nsIPrompt** aPrompt) override;
 protected:
  explicit nsGlobalWindowInner(nsGlobalWindowOuter *aOuterWindow);
  // Initializes the mWasOffline member variable
@ -726,11 +658,9 @@ public:
  nsPIDOMWindowOuter* GetOpenerWindow(mozilla::ErrorResult& aError);
  void GetOpener(JSContext* aCx, JS::MutableHandle<JS::Value> aRetval,
                 mozilla::ErrorResult& aError);
-  already_AddRefed<nsPIDOMWindowOuter> GetOpener() override;
  void SetOpener(JSContext* aCx, JS::Handle<JS::Value> aOpener,
                 mozilla::ErrorResult& aError);
  already_AddRefed<nsPIDOMWindowOuter> GetParent(mozilla::ErrorResult& aError);
-  already_AddRefed<nsPIDOMWindowOuter> GetParent() override;
  nsPIDOMWindowOuter* GetScriptableParent() override;
  nsPIDOMWindowOuter* GetScriptableParentOrNull() override;
  mozilla::dom::Element*
@ -742,11 +672,6 @@ public:
       const nsAString& aName,
       const nsAString& aOptions,
       mozilla::ErrorResult& aError);
-  nsresult Open(const nsAString& aUrl, const nsAString& aName,
-                const nsAString& aOptions,
-                nsIDocShellLoadInfo* aLoadInfo,
-                bool aForceNoOpener,
-                nsPIDOMWindowOuter **_retval) override;
  mozilla::dom::Navigator* Navigator();
  nsIDOMNavigator* GetNavigator() override;
  nsIDOMOfflineResourceList* GetApplicationCache(mozilla::ErrorResult& aError);
@ -836,7 +761,6 @@ public:
  mozilla::dom::Storage*
  GetLocalStorage(mozilla::ErrorResult& aError);
  mozilla::dom::Selection* GetSelection(mozilla::ErrorResult& aError);
-  already_AddRefed<nsISelection> GetSelection() override;
  mozilla::dom::IDBFactory* GetIndexedDB(mozilla::ErrorResult& aError);
  already_AddRefed<nsICSSDeclaration>
    GetComputedStyle(mozilla::dom::Element& aElt, const nsAString& aPseudoElt,
@ -853,7 +777,6 @@ public:
  void MoveBy(int32_t aXDif, int32_t aYDif,
              mozilla::dom::CallerType aCallerType,
              mozilla::ErrorResult& aError);
-  nsresult MoveBy(int32_t aXDif, int32_t aYDif) override;
  void ResizeTo(int32_t aWidth, int32_t aHeight,
                mozilla::dom::CallerType aCallerType,
                mozilla::ErrorResult& aError);
@ -956,7 +879,6 @@ public:
  bool GetFullScreen(mozilla::ErrorResult& aError);
  bool GetFullScreen() override;
  void SetFullScreen(bool aFullScreen, mozilla::ErrorResult& aError);
-  nsresult SetFullScreen(bool aFullScreen) override;
  void Back(mozilla::ErrorResult& aError);
  void Forward(mozilla::ErrorResult& aError);
  void Home(nsIPrincipal& aSubjectPrincipal, mozilla::ErrorResult& aError);
@ -976,10 +898,6 @@ public:
             const nsAString& aOptions,
             const mozilla::dom::Sequence<JS::Value>& aExtraArgument,
             mozilla::ErrorResult& aError);
-  nsresult OpenDialog(const nsAString& aUrl, const nsAString& aName,
-                      const nsAString& aOptions,
-                      nsISupports* aExtraArgument,
-                      nsPIDOMWindowOuter** _retval) override;
  nsresult UpdateCommands(const nsAString& anAction, nsISelection* aSel, int16_t aReason) override;

  void GetContent(JSContext* aCx,
@ -1157,9 +1075,6 @@ protected:
  // Object Management
  virtual ~nsGlobalWindowInner();
  void CleanUp();
-  void ClearControllers();
-
-  inline void MaybeClearInnerWindow(nsGlobalWindowInner* aExpectedInner);

  void FreeInnerObjects();
  nsGlobalWindowInner *CallerInnerWindow();
@ -1181,16 +1096,6 @@ public:
  // popup tracking
  bool IsPopupSpamWindow();

-protected:
-  // Window Control Functions
-
-  // Outer windows only.
-  virtual nsresult
-  OpenNoNavigate(const nsAString& aUrl,
-                 const nsAString& aName,
-                 const nsAString& aOptions,
-                 nsPIDOMWindowOuter** _retval) override;
-
 private:
  template<typename Method>
  void CallOnChildren(Method aMethod);
@ -1256,9 +1161,6 @@ public:

  virtual bool ShouldShowFocusRing() override;

-  virtual void SetKeyboardIndicators(UIStateChangeType aShowAccelerators,
-                                     UIStateChangeType aShowFocusRings) override;
-
  // Inner windows only.
  void UpdateCanvasFocus(bool aFocusChanged, nsIContent* aNewContent);

@ -1310,10 +1212,7 @@ private:

  void DisconnectEventTargetObjects();

-  // nsPIDOMWindow<T> should be able to see these helper methods.
-  friend class nsPIDOMWindow<mozIDOMWindowProxy>;
-  friend class nsPIDOMWindow<mozIDOMWindow>;
-  friend class nsPIDOMWindow<nsISupports>;
+  // nsPIDOMWindow{Inner,Outer} should be able to see these helper methods.
  friend class nsPIDOMWindowInner;
  friend class nsPIDOMWindowOuter;

@ -1360,23 +1259,7 @@ public:
  void RemoveIdleCallback(mozilla::dom::IdleRequest* aRequest);

 protected:
-  // These members are only used on outer window objects. Make sure
-  // you never set any of these on an inner object!
-  bool                          mFullScreen : 1;
-  bool                          mFullscreenMode : 1;
-  bool                          mIsClosed : 1;
-  bool                          mInClose : 1;
-  // mHavePendingClose means we've got a termination function set to
-  // close us when the JS stops executing or that we have a close
-  // event posted.  If this is set, just ignore window.close() calls.
-  bool                          mHavePendingClose : 1;
-  bool                          mHadOriginalOpener : 1;
-  bool                          mOriginalOpenerWasSecureContext : 1;
  bool                          mIsSecureContextIfOpenerIgnored : 1;
-  bool                          mIsPopupSpam : 1;
-
-  // Indicates whether scripts are allowed to close this window.
-  bool                          mBlockScriptedClosingFlag : 1;

  // Window offline status. Checked to see if we need to fire offline event
  bool                          mWasOffline : 1;
@ -1390,10 +1273,6 @@ protected:
  bool                          mNotifyIdleObserversIdleOnThaw : 1;
  bool                          mNotifyIdleObserversActiveOnThaw : 1;

-  // Indicates whether we're in the middle of creating an initializing
-  // a new inner window object.
-  bool                          mCreatingInnerWindow : 1;
-
  // Fast way to tell if this is a chrome window (without having to QI).
  bool                          mIsChrome : 1;

@ -1415,53 +1294,29 @@ protected:
  // should be displayed.
  bool                   mFocusByKeyOccurred : 1;

-  // Inner windows only.
  // Indicates whether this window wants gamepad input events
  bool                   mHasGamepad : 1;

-  // Inner windows only.
  // Indicates whether this window wants VR events
  bool                   mHasVREvents : 1;

-  // Inner windows only.
  // Indicates whether this window wants VRDisplayActivate events
  bool                   mHasVRDisplayActivateEvents : 1;
  nsCheapSet<nsUint32HashKey> mGamepadIndexSet;
  nsRefPtrHashtable<nsUint32HashKey, mozilla::dom::Gamepad> mGamepads;
  bool mHasSeenGamepadInput;

-  // whether we've sent the destroy notification for our window id
-  bool                   mNotifiedIDDestroyed : 1;
-  // whether scripts may close the window,
-  // even if "dom.allow_scripts_to_close_windows" is false.
-  bool                   mAllowScriptsToClose : 1;
-
-  bool mTopLevelOuterContentWindow : 1;
-
-  nsCOMPtr<nsIScriptContext>    mContext;
-  nsWeakPtr                     mOpener;
-  nsCOMPtr<nsIControllers>      mControllers;
-
-  // For |window.arguments|, via |openDialog|.
-  nsCOMPtr<nsIArray>            mArguments;
-
-  // Only used in the outer.
-  RefPtr<DialogValueHolder> mReturnValue;
-
  RefPtr<mozilla::dom::Navigator> mNavigator;
  RefPtr<nsScreen>            mScreen;
-  RefPtr<nsDOMWindowList>     mFrames;
-  // All BarProps are inner window only.
+
  RefPtr<mozilla::dom::BarProp> mMenubar;
  RefPtr<mozilla::dom::BarProp> mToolbar;
  RefPtr<mozilla::dom::BarProp> mLocationbar;
  RefPtr<mozilla::dom::BarProp> mPersonalbar;
  RefPtr<mozilla::dom::BarProp> mStatusbar;
  RefPtr<mozilla::dom::BarProp> mScrollbars;
-  RefPtr<nsDOMWindowUtils>      mWindowUtils;
-  nsString                      mStatus;
-  nsString                      mDefaultStatus;
-  RefPtr<nsGlobalWindowObserver> mObserver; // Inner windows only.
+
+  RefPtr<nsGlobalWindowObserver> mObserver;
  RefPtr<mozilla::dom::Crypto>  mCrypto;
  RefPtr<mozilla::dom::U2F> mU2F;
  RefPtr<mozilla::dom::cache::CacheStorage> mCacheStorage;
@ -1479,13 +1334,11 @@ protected:
  RefPtr<mozilla::dom::Storage> mLocalStorage;
  RefPtr<mozilla::dom::Storage> mSessionStorage;

-  // These member variable are used only on inner windows.
  RefPtr<mozilla::EventListenerManager> mListenerManager;
  RefPtr<mozilla::dom::Location> mLocation;
  RefPtr<nsHistory>           mHistory;
  RefPtr<mozilla::dom::CustomElementRegistry> mCustomElements;

-  // These member variables are used on both inner and the outer windows.
  nsCOMPtr<nsIPrincipal> mDocumentPrincipal;
  // mTabChild is only ever populated in the content process.
  nsCOMPtr<nsITabChild>  mTabChild;
@ -1504,7 +1357,6 @@ protected:
  RefPtr<IdleRequestExecutor> mIdleRequestExecutor;

 #ifdef DEBUG
-  bool mSetOpenerWindowCalled;
  nsCOMPtr<nsIURI> mLastOpenedURI;
 #endif

@ -1515,14 +1367,6 @@ protected:
  using XBLPrototypeHandlerTable = nsJSThingHashtable<nsPtrHashKey<nsXBLPrototypeHandler>, JSObject*>;
  mozilla::UniquePtr<XBLPrototypeHandlerTable> mCachedXBLPrototypeHandlers;

-  // mSuspendedDoc is only set on outer windows. It's useful when we get matched
-  // EnterModalState/LeaveModalState calls, in which case the outer window is
-  // responsible for unsuspending events on the document. If we don't (for
-  // example, if the outer window is closed before the LeaveModalState call),
-  // then the inner window whose mDoc is our mSuspendedDoc is responsible for
-  // unsuspending it.
-  nsCOMPtr<nsIDocument> mSuspendedDoc;
-
  RefPtr<mozilla::dom::IDBFactory> mIndexedDB;

  // This counts the number of windows that have been opened in rapid succession
@ -1550,16 +1394,9 @@ protected:
 #endif

 #ifdef MOZ_WEBSPEECH
-  // mSpeechSynthesis is only used on inner windows.
  RefPtr<mozilla::dom::SpeechSynthesis> mSpeechSynthesis;
 #endif

-#ifdef DEBUG
-  // This member is used in the debug only assertions in TabGroup()
-  // to catch cyclic parent/opener trees and not overflow the stack.
-  bool mIsValidatingTabGroup;
-#endif
-
  // This is the CC generation the last time we called CanSkip.
  uint32_t mCanSkipCCGeneration;

@ -1568,11 +1405,7 @@ protected:

  RefPtr<mozilla::dom::VREventObserver> mVREventObserver;

-  // When non-zero, the document should receive a vrdisplayactivate event
-  // after loading.  The value is the ID of the VRDisplay that content should
-  // begin presentation on.
-  uint32_t mAutoActivateVRDisplayID; // Outer windows only
-  int64_t mBeforeUnloadListenerCount; // Inner windows only
+  int64_t mBeforeUnloadListenerCount;

  RefPtr<mozilla::dom::IntlUtils> mIntlUtils;

@ -1587,16 +1420,15 @@ protected:
      : mGroupMessageManagers(1)
    {}

-    nsCOMPtr<nsIBrowserDOMWindow> mBrowserDOMWindow;
    nsCOMPtr<nsIMessageBroadcaster> mMessageManager;
    nsInterfaceHashtable<nsStringHashKey, nsIMessageBroadcaster> mGroupMessageManagers;
-    // A weak pointer to the nsPresShell that we are doing fullscreen for.
-    // The pointer being set indicates we've set the IsInFullscreenChange
-    // flag on this pres shell.
-    nsWeakPtr mFullscreenPresShell;
-    nsCOMPtr<mozIDOMWindowProxy> mOpenerForInitialContentBrowser;
  } mChromeFields;

+  // These fields are used by the inner and outer windows to prevent
+  // programatically moving the window while the mouse is down.
+  static bool sMouseDown;
+  static bool sDragServiceDisabled;
+
  friend class nsDOMScriptableHelper;
  friend class nsDOMWindowUtils;
  friend class mozilla::dom::PostMessageEvent;
@ -1652,7 +1484,7 @@ nsGlobalWindowInner::GetContextInternal()
    return GetOuterWindowInternal()->mContext;
  }

-  return mContext;
+  return nullptr;
 }

 inline nsGlobalWindowOuter*
@ -1664,7 +1496,7 @@ nsGlobalWindowInner::GetOuterWindowInternal() const
 inline bool
 nsGlobalWindowInner::IsPopupSpamWindow()
 {
-  if (IsInnerWindow() && !mOuterWindow) {
+  if (!mOuterWindow) {
    return false;
  }

@ -1677,12 +1509,4 @@ nsGlobalWindowInner::IsFrame()
  return GetParentInternal() != nullptr;
 }

-inline void
-nsGlobalWindowInner::MaybeClearInnerWindow(nsGlobalWindowInner* aExpectedInner)
-{
-  if(mInnerWindow == aExpectedInner->AsInner()) {
-    mInnerWindow = nullptr;
-  }
-}
-
 #endif /* nsGlobalWindowInner_h___ */
--- a/dom/base/nsGlobalWindowOuter.cpp
+++ b/dom/base/nsGlobalWindowOuter.cpp
--- a/dom/base/nsGlobalWindowOuter.h
+++ b/dom/base/nsGlobalWindowOuter.h
@ -46,7 +46,6 @@
 #include "mozilla/Attributes.h"
 #include "mozilla/GuardObjects.h"
 #include "mozilla/LinkedList.h"
-#include "mozilla/TimeStamp.h"
 #include "nsWrapperCacheInlines.h"
 #include "nsIIdleObserver.h"
 #include "nsIDocument.h"
@ -151,59 +150,17 @@ NS_CreateJSTimeoutHandler(JSContext* aCx, nsGlobalWindowInner *aWindow,

 extern const js::Class OuterWindowProxyClass;

-// Helper class to manage modal dialog arguments and all their quirks.
-//
-// Given our clunky embedding APIs, modal dialog arguments need to be passed
-// as an nsISupports parameter to WindowWatcher, get stuck inside an array of
-// length 1, and then passed back to the newly-created dialog.
-//
-// However, we need to track both the caller-passed value as well as the
-// caller's, so that we can do an origin check (even for primitives) when the
-// value is accessed. This class encapsulates that magic.
-//
-// We also use the same machinery for |returnValue|, which needs similar origin
-// checks.
-class DialogValueHolder final : public nsISupports
-{
-public:
-  NS_DECL_CYCLE_COLLECTING_ISUPPORTS
-  NS_DECL_CYCLE_COLLECTION_CLASS(DialogValueHolder)
-
-  DialogValueHolder(nsIPrincipal* aSubject, nsIVariant* aValue)
-    : mOrigin(aSubject)
-    , mValue(aValue) {}
-  nsresult Get(nsIPrincipal* aSubject, nsIVariant** aResult);
-  void Get(JSContext* aCx, JS::Handle<JSObject*> aScope, nsIPrincipal* aSubject,
-           JS::MutableHandle<JS::Value> aResult, mozilla::ErrorResult& aError);
-private:
-  virtual ~DialogValueHolder() {}
-
-  nsCOMPtr<nsIPrincipal> mOrigin;
-  nsCOMPtr<nsIVariant> mValue;
-};
-
-
-// NOTE: Currently this file, despite being named mozilla/dom/WindowProxy.h,
-// exports the class nsGlobalWindowOuter. It will be renamed in the future to
-// mozilla::dom::WindowProxy.
-
 //*****************************************************************************
-// nsGlobalWindow: Global Object for Scripting
+// nsGlobalWindowOuter
 //*****************************************************************************
-// Beware that all scriptable interfaces implemented by
-// nsGlobalWindow will be reachable from JS, if you make this class
-// implement new interfaces you better know what you're
-// doing. Security wise this is very sensitive code. --
-// jst@netscape.com

-// nsGlobalWindow inherits PRCList for maintaining a list of all inner
-// windows still in memory for any given outer window. This list is
-// needed to ensure that mOuterWindow doesn't end up dangling. The
-// nature of PRCList means that the window itself is always in the
-// list, and an outer window's list will also contain all inner window
-// objects that are still in memory (and in reality all inner window
-// object's lists also contain its outer and all other inner windows
-// belonging to the same outer window, but that's an unimportant
+// nsGlobalWindowOuter inherits PRCList for maintaining a list of all inner
+// windows still in memory for any given outer window. This list is needed to
+// ensure that mOuterWindow doesn't end up dangling. The nature of PRCList means
+// that the window itself is always in the list, and an outer window's list will
+// also contain all inner window objects that are still in memory (and in
+// reality all inner window object's lists also contain its outer and all other
+// inner windows belonging to the same outer window, but that's an unimportant
 // side effect of inheriting PRCList).

 class nsGlobalWindowOuter : public mozilla::dom::EventTarget,
@ -219,9 +176,6 @@ class nsGlobalWindowOuter : public mozilla::dom::EventTarget,
                            public PRCListStr
 {
 public:
-  typedef mozilla::TimeStamp TimeStamp;
-  typedef mozilla::TimeDuration TimeDuration;
-
  typedef nsDataHashtable<nsUint64HashKey, nsGlobalWindowOuter*> OuterWindowByIdTable;

  static void
@ -252,8 +206,6 @@ public:
    }

    nsGlobalWindowOuter* outerWindow = sOuterWindowsById->Get(aWindowID);
-    MOZ_ASSERT(!outerWindow || outerWindow->IsOuterWindow(),
-                "Inner window in sOuterWindowsById?");
    return outerWindow;
  }

@ -406,9 +358,6 @@ public:
                           nsIWidget* aWidget, nsIScreen* aScreen);
  bool FullScreen() const;

-  // Inner windows only.
-  virtual void SetHasGamepadEventListener(bool aHasGamepad = true) override;
-
  using EventTarget::EventListenerAdded;
  virtual void EventListenerAdded(nsAtom* aType) override;
  using EventTarget::EventListenerRemoved;
@ -498,43 +447,14 @@ public:
  static void ShutDown();
  static bool IsCallerChrome();

-  void CleanupCachedXBLHandlers();
-
  friend class WindowStateHolder;

  NS_DECL_CYCLE_COLLECTION_SKIPPABLE_SCRIPT_HOLDER_CLASS_AMBIGUOUS(nsGlobalWindowOuter,
                                                                   nsIDOMEventTarget)

-#ifdef DEBUG
-  // Call Unlink on this window. This may cause bad things to happen, so use
-  // with caution.
-  void RiskyUnlink();
-#endif
-
-  virtual JSObject*
-    GetCachedXBLPrototypeHandler(nsXBLPrototypeHandler* aKey) override;
-
-  virtual void
-    CacheXBLPrototypeHandler(nsXBLPrototypeHandler* aKey,
-                             JS::Handle<JSObject*> aHandler) override;
-
  virtual bool TakeFocus(bool aFocus, uint32_t aFocusMethod) override;
  virtual void SetReadyForFocus() override;
  virtual void PageHidden() override;
-  virtual nsresult DispatchAsyncHashchange(nsIURI *aOldURI, nsIURI *aNewURI) override;
-  virtual nsresult DispatchSyncPopState() override;
-
-  // Inner windows only.
-  virtual void EnableDeviceSensor(uint32_t aType) override;
-  virtual void DisableDeviceSensor(uint32_t aType) override;
-
-#if defined(MOZ_WIDGET_ANDROID)
-  virtual void EnableOrientationChangeListener() override;
-  virtual void DisableOrientationChangeListener() override;
-#endif
-
-  virtual void EnableTimeChangeNotifications() override;
-  virtual void DisableTimeChangeNotifications() override;

  virtual nsresult SetArguments(nsIArray* aArguments) override;

@ -555,7 +475,6 @@ public:
  bool
  HadOriginalOpener() const
  {
-    MOZ_ASSERT(IsOuterWindow());
    return mHadOriginalOpener;
  }

@ -647,7 +566,6 @@ public:
  void GetNameOuter(nsAString& aName);
  void SetNameOuter(const nsAString& aName, mozilla::ErrorResult& aError);
  mozilla::dom::Location* GetLocation() override;
-  mozilla::dom::CustomElementRegistry* CustomElements() override;
  void GetStatusOuter(nsAString& aStatus);
  void SetStatusOuter(const nsAString& aStatus);
  void CloseOuter(bool aTrustedCaller);
@ -692,7 +610,6 @@ public:
                bool aForceNoOpener,
                nsPIDOMWindowOuter **_retval) override;
  nsIDOMNavigator* GetNavigator() override;
-  already_AddRefed<nsIDOMOfflineResourceList> GetApplicationCache() override;

 #if defined(MOZ_WIDGET_ANDROID)
  int16_t Orientation(mozilla::dom::CallerType aCallerType) const;
@ -717,9 +634,6 @@ public:
  void PrintOuter(mozilla::ErrorResult& aError);
  mozilla::dom::Selection* GetSelectionOuter();
  already_AddRefed<nsISelection> GetSelection() override;
-  already_AddRefed<nsICSSDeclaration>
-    GetComputedStyle(mozilla::dom::Element& aElt, const nsAString& aPseudoElt,
-                     mozilla::ErrorResult& aError) override;
  already_AddRefed<mozilla::dom::MediaQueryList> MatchMediaOuter(
    const nsAString& aQuery,
    mozilla::dom::CallerType aCallerType);
@ -784,7 +698,6 @@ public:
                       mozilla::ErrorResult& aError);
  already_AddRefed<nsPIDOMWindowOuter> GetContent()
  {
-    MOZ_ASSERT(IsOuterWindow());
    mozilla::IgnoredErrorResult ignored;
    nsCOMPtr<nsPIDOMWindowOuter> win =
      GetContentInternal(ignored, mozilla::dom::CallerType::System);
@ -1002,9 +915,6 @@ private:
  void ReportLargeAllocStatus();

 public:
-  virtual nsresult RegisterIdleObserver(nsIIdleObserver* aIdleObserverPtr) override;
-  virtual nsresult UnregisterIdleObserver(nsIIdleObserver* aIdleObserverPtr) override;
-
  void FlushPendingNotifications(mozilla::FlushType aType);

  // Outer windows only.
@ -1132,32 +1042,14 @@ private:
                              SecureContextFlags aFlags =
                                SecureContextFlags::eDefault);

-  // nsPIDOMWindow<T> should be able to see these helper methods.
-  friend class nsPIDOMWindow<mozIDOMWindowProxy>;
-  friend class nsPIDOMWindow<mozIDOMWindow>;
-  friend class nsPIDOMWindow<nsISupports>;
+  // nsPIDOMWindow{Inner,Outer} should be able to see these helper methods.
  friend class nsPIDOMWindowInner;
  friend class nsPIDOMWindowOuter;

  mozilla::dom::TabGroup* TabGroupOuter();

-  bool IsBackgroundInternal() const;
-
  void SetIsBackgroundInternal(bool aIsBackground);

-  // NOTE: Chrome Only
-  void DisconnectAndClearGroupMessageManagers()
-  {
-    MOZ_RELEASE_ASSERT(IsChromeWindow());
-    for (auto iter = mChromeFields.mGroupMessageManagers.Iter(); !iter.Done(); iter.Next()) {
-      nsIMessageBroadcaster* mm = iter.UserData();
-      if (mm) {
-        static_cast<nsFrameMessageManager*>(mm)->Disconnect();
-      }
-    }
-    mChromeFields.mGroupMessageManagers.Clear();
-  }
-
  nsresult GetInterfaceInternal(const nsIID& aIID, void** aSink);

 public:
@ -1171,17 +1063,9 @@ public:
  virtual mozilla::AbstractThread*
  AbstractMainThreadFor(mozilla::TaskCategory aCategory) override;

-  uint32_t LastIdleRequestHandle() const { return mIdleRequestCallbackCounter - 1; }
-  nsresult RunIdleRequest(mozilla::dom::IdleRequest* aRequest,
-                          DOMHighResTimeStamp aDeadline, bool aDidTimeout);
-
  typedef mozilla::LinkedList<mozilla::dom::IdleRequest> IdleRequests;

-  void RemoveIdleCallback(mozilla::dom::IdleRequest* aRequest);
-
 protected:
-  // These members are only used on outer window objects. Make sure
-  // you never set any of these on an inner object!
  bool                          mFullScreen : 1;
  bool                          mFullscreenMode : 1;
  bool                          mIsClosed : 1;
@ -1192,7 +1076,6 @@ protected:
  bool                          mHavePendingClose : 1;
  bool                          mHadOriginalOpener : 1;
  bool                          mOriginalOpenerWasSecureContext : 1;
-  bool                          mIsSecureContextIfOpenerIgnored : 1;
  bool                          mIsPopupSpam : 1;

  // Indicates whether scripts are allowed to close this window.
@ -1201,15 +1084,6 @@ protected:
  // Window offline status. Checked to see if we need to fire offline event
  bool                          mWasOffline : 1;

-  // Represents whether the inner window's page has had a slow script notice.
-  // Only used by inner windows; will always be false for outer windows.
-  // This is used to implement Telemetry measures such as SLOW_SCRIPT_PAGE_COUNT.
-  bool                          mHasHadSlowScript : 1;
-
-  // Track what sorts of events we need to fire when thawed
-  bool                          mNotifyIdleObserversIdleOnThaw : 1;
-  bool                          mNotifyIdleObserversActiveOnThaw : 1;
-
  // Indicates whether we're in the middle of creating an initializing
  // a new inner window object.
  bool                          mCreatingInnerWindow : 1;
@ -1217,41 +1091,6 @@ protected:
  // Fast way to tell if this is a chrome window (without having to QI).
  bool                          mIsChrome : 1;

-  // Hack to indicate whether a chrome window needs its message manager
-  // to be disconnected, since clean up code is shared in the global
-  // window superclass.
-  bool                          mCleanMessageManager : 1;
-
-  // Indicates that the current document has never received a document focus
-  // event.
-  bool                   mNeedsFocus : 1;
-  bool                   mHasFocus : 1;
-
-  // when true, show focus rings for the current focused content only.
-  // This will be reset when another element is focused
-  bool                   mShowFocusRingForContent : 1;
-
-  // true if tab navigation has occurred for this window. Focus rings
-  // should be displayed.
-  bool                   mFocusByKeyOccurred : 1;
-
-  // Inner windows only.
-  // Indicates whether this window wants gamepad input events
-  bool                   mHasGamepad : 1;
-
-  // Inner windows only.
-  // Indicates whether this window wants VR events
-  bool                   mHasVREvents : 1;
-
-  // Inner windows only.
-  // Indicates whether this window wants VRDisplayActivate events
-  bool                   mHasVRDisplayActivateEvents : 1;
-  nsCheapSet<nsUint32HashKey> mGamepadIndexSet;
-  nsRefPtrHashtable<nsUint32HashKey, mozilla::dom::Gamepad> mGamepads;
-  bool mHasSeenGamepadInput;
-
-  // whether we've sent the destroy notification for our window id
-  bool                   mNotifiedIDDestroyed : 1;
  // whether scripts may close the window,
  // even if "dom.allow_scripts_to_close_windows" is false.
  bool                   mAllowScriptsToClose : 1;
@ -1265,64 +1104,18 @@ protected:
  // For |window.arguments|, via |openDialog|.
  nsCOMPtr<nsIArray>            mArguments;

-  // Only used in the outer.
-  RefPtr<DialogValueHolder> mReturnValue;
-
-  RefPtr<mozilla::dom::Navigator> mNavigator;
-  RefPtr<nsScreen>            mScreen;
  RefPtr<nsDOMWindowList>     mFrames;
-  // All BarProps are inner window only.
-  RefPtr<mozilla::dom::BarProp> mMenubar;
-  RefPtr<mozilla::dom::BarProp> mToolbar;
-  RefPtr<mozilla::dom::BarProp> mLocationbar;
-  RefPtr<mozilla::dom::BarProp> mPersonalbar;
-  RefPtr<mozilla::dom::BarProp> mStatusbar;
-  RefPtr<mozilla::dom::BarProp> mScrollbars;
  RefPtr<nsDOMWindowUtils>      mWindowUtils;
  nsString                      mStatus;
-  nsString                      mDefaultStatus;
-  RefPtr<nsGlobalWindowObserver> mObserver; // Inner windows only.
-  RefPtr<mozilla::dom::Crypto>  mCrypto;
-  RefPtr<mozilla::dom::U2F> mU2F;
-  RefPtr<mozilla::dom::cache::CacheStorage> mCacheStorage;
-  RefPtr<mozilla::dom::Console> mConsole;
-  RefPtr<mozilla::dom::Worklet> mAudioWorklet;
-  RefPtr<mozilla::dom::Worklet> mPaintWorklet;
-  // We need to store an nsISupports pointer to this object because the
-  // mozilla::dom::External class doesn't exist on b2g and using the type
-  // forward declared here means that ~nsGlobalWindow wouldn't compile because
-  // it wouldn't see the ~External function's declaration.
-  nsCOMPtr<nsISupports>         mExternal;
-
-  RefPtr<mozilla::dom::MozSelfSupport> mMozSelfSupport;

  RefPtr<mozilla::dom::Storage> mLocalStorage;
-  RefPtr<mozilla::dom::Storage> mSessionStorage;

-  // These member variable are used only on inner windows.
-  RefPtr<mozilla::EventListenerManager> mListenerManager;
-  RefPtr<mozilla::dom::Location> mLocation;
-  RefPtr<nsHistory>           mHistory;
-  RefPtr<mozilla::dom::CustomElementRegistry> mCustomElements;
-
-  // These member variables are used on both inner and the outer windows.
  nsCOMPtr<nsIPrincipal> mDocumentPrincipal;
  // mTabChild is only ever populated in the content process.
  nsCOMPtr<nsITabChild>  mTabChild;

-  uint32_t mSuspendDepth;
-  uint32_t mFreezeDepth;
-
-  // the method that was used to focus mFocusedNode
-  uint32_t mFocusMethod;
-
  uint32_t mSerial;

-  // The current idle request callback handle
-  uint32_t mIdleRequestCallbackCounter;
-  IdleRequests mIdleRequestCallbacks;
-  RefPtr<IdleRequestExecutor> mIdleRequestExecutor;
-
 #ifdef DEBUG
  bool mSetOpenerWindowCalled;
  nsCOMPtr<nsIURI> mLastOpenedURI;
@ -1330,50 +1123,13 @@ protected:

  bool mCleanedUp;

-  nsCOMPtr<nsIDOMOfflineResourceList> mApplicationCache;
-
-  using XBLPrototypeHandlerTable = nsJSThingHashtable<nsPtrHashKey<nsXBLPrototypeHandler>, JSObject*>;
-  mozilla::UniquePtr<XBLPrototypeHandlerTable> mCachedXBLPrototypeHandlers;
-
-  // mSuspendedDoc is only set on outer windows. It's useful when we get matched
-  // EnterModalState/LeaveModalState calls, in which case the outer window is
-  // responsible for unsuspending events on the document. If we don't (for
-  // example, if the outer window is closed before the LeaveModalState call),
-  // then the inner window whose mDoc is our mSuspendedDoc is responsible for
-  // unsuspending it.
+  // It's useful when we get matched EnterModalState/LeaveModalState calls, in
+  // which case the outer window is responsible for unsuspending events on the
+  // document. If we don't (for example, if the outer window is closed before
+  // the LeaveModalState call), then the inner window whose mDoc is our
+  // mSuspendedDoc is responsible for unsuspending it.
  nsCOMPtr<nsIDocument> mSuspendedDoc;

-  RefPtr<mozilla::dom::IDBFactory> mIndexedDB;
-
-  // This counts the number of windows that have been opened in rapid succession
-  // (i.e. within dom.successive_dialog_time_limit of each other). It is reset
-  // to 0 once a dialog is opened after dom.successive_dialog_time_limit seconds
-  // have elapsed without any other dialogs.
-  uint32_t                      mDialogAbuseCount;
-
-  // This holds the time when the last modal dialog was shown. If more than
-  // MAX_DIALOG_LIMIT dialogs are shown within the time span defined by
-  // dom.successive_dialog_time_limit, we show a checkbox or confirmation prompt
-  // to allow disabling of further dialogs from this window.
-  TimeStamp                     mLastDialogQuitTime;
-
-  // This flag keeps track of whether dialogs are
-  // currently enabled on this window.
-  bool                          mAreDialogsEnabled;
-
-  nsTHashtable<nsPtrHashKey<mozilla::DOMEventTargetHelper> > mEventTargetObjects;
-
-  nsTArray<uint32_t> mEnabledSensors;
-
-#if defined(MOZ_WIDGET_ANDROID)
-  mozilla::UniquePtr<mozilla::dom::WindowOrientationObserver> mOrientationChangeObserver;
-#endif
-
-#ifdef MOZ_WEBSPEECH
-  // mSpeechSynthesis is only used on inner windows.
-  RefPtr<mozilla::dom::SpeechSynthesis> mSpeechSynthesis;
-#endif
-
 #ifdef DEBUG
  // This member is used in the debug only assertions in TabGroup()
  // to catch cyclic parent/opener trees and not overflow the stack.
@ -1383,36 +1139,21 @@ protected:
  // This is the CC generation the last time we called CanSkip.
  uint32_t mCanSkipCCGeneration;

-  // The VR Displays for this window
-  nsTArray<RefPtr<mozilla::dom::VRDisplay>> mVRDisplays;
-
-  RefPtr<mozilla::dom::VREventObserver> mVREventObserver;
-
  // When non-zero, the document should receive a vrdisplayactivate event
  // after loading.  The value is the ID of the VRDisplay that content should
  // begin presentation on.
-  uint32_t mAutoActivateVRDisplayID; // Outer windows only
-  int64_t mBeforeUnloadListenerCount; // Inner windows only
-
-  RefPtr<mozilla::dom::IntlUtils> mIntlUtils;
+  uint32_t mAutoActivateVRDisplayID;

  static OuterWindowByIdTable* sOuterWindowsById;

  // Members in the mChromeFields member should only be used in chrome windows.
  // All accesses to this field should be guarded by a check of mIsChrome.
  struct ChromeFields {
-    ChromeFields()
-      : mGroupMessageManagers(1)
-    {}
-
    nsCOMPtr<nsIBrowserDOMWindow> mBrowserDOMWindow;
-    nsCOMPtr<nsIMessageBroadcaster> mMessageManager;
-    nsInterfaceHashtable<nsStringHashKey, nsIMessageBroadcaster> mGroupMessageManagers;
    // A weak pointer to the nsPresShell that we are doing fullscreen for.
    // The pointer being set indicates we've set the IsInFullscreenChange
    // flag on this pres shell.
    nsWeakPtr mFullscreenPresShell;
-    nsCOMPtr<mozIDOMWindowProxy> mOpenerForInitialContentBrowser;
  } mChromeFields;

  friend class nsDOMScriptableHelper;
@ -1465,10 +1206,6 @@ nsGlobalWindowOuter::GetScriptableTopInternal()
 inline nsIScriptContext*
 nsGlobalWindowOuter::GetContextInternal()
 {
-  if (mOuterWindow) {
-    return GetOuterWindowInternal()->mContext;
-  }
-
  return mContext;
 }

@ -1481,7 +1218,6 @@ nsGlobalWindowOuter::GetOuterWindowInternal()
 inline nsGlobalWindowInner*
 nsGlobalWindowOuter::GetCurrentInnerWindowInternal() const
 {
-  MOZ_ASSERT(IsOuterWindow());
  return nsGlobalWindowInner::Cast(mInnerWindow);
 }

@ -1494,7 +1230,6 @@ nsGlobalWindowOuter::EnsureInnerWindowInternal()
 inline bool
 nsGlobalWindowOuter::IsTopLevelWindow()
 {
-  MOZ_ASSERT(IsOuterWindow());
  nsPIDOMWindowOuter* parentWindow = GetScriptableTop();
  return parentWindow == this->AsOuter();
 }
--- a/dom/base/nsHistory.cpp
+++ b/dom/base/nsHistory.cpp
@ -40,7 +40,6 @@ NS_INTERFACE_MAP_END
 nsHistory::nsHistory(nsPIDOMWindowInner* aInnerWindow)
  : mInnerWindow(do_GetWeakReference(aInnerWindow))
 {
-  MOZ_ASSERT(aInnerWindow->IsInnerWindow());
 }

 nsHistory::~nsHistory()
--- a/dom/base/nsIDocument.h
+++ b/dom/base/nsIDocument.h
@ -900,6 +900,15 @@ public:
    mBufferedCSPViolations.AppendElement(aReportingRunnable, mozilla::fallible);
  }

+  /**
+   * Called when the document was decoded as UTF-8 and decoder encountered no
+   * errors.
+   */
+  void DisableEncodingMenu()
+  {
+    mEncodingMenuDisabled = true;
+  }
+
  /**
   * Access HTTP header data (this may also get set from other
   * sources, like HTML META tags).
@ -3592,6 +3601,9 @@ protected:
  // True if the document is allowed to use PaymentRequest.
  bool mAllowPaymentRequest : 1;

+  // True if the encoding menu should be disabled.
+  bool mEncodingMenuDisabled : 1;
+
  // Whether <style scoped> support is enabled in this document.
  enum { eScopedStyle_Unknown, eScopedStyle_Disabled, eScopedStyle_Enabled };
  unsigned int mIsScopedStyleEnabled : 2;
--- a/dom/base/nsInProcessTabChildGlobal.cpp
+++ b/dom/base/nsInProcessTabChildGlobal.cpp
@ -230,7 +230,6 @@ nsInProcessTabChildGlobal::DisconnectEventListeners()
 {
  if (mDocShell) {
    if (nsCOMPtr<nsPIDOMWindowOuter> win = mDocShell->GetWindow()) {
-      MOZ_ASSERT(win->IsOuterWindow());
      win->SetChromeEventHandler(win->GetChromeEventHandler());
    }
  }
--- a/dom/base/nsPIDOMWindow.h
+++ b/dom/base/nsPIDOMWindow.h
--- a/dom/base/nsPIDOMWindowInlines.h
+++ b/dom/base/nsPIDOMWindowInlines.h
@ -4,54 +4,23 @@
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

-template<class T>
-nsPIDOMWindowInner*
-nsPIDOMWindow<T>::AsInner()
-{
-  MOZ_ASSERT(IsInnerWindow());
-  return reinterpret_cast<nsPIDOMWindowInner*>(this);
-}
-
-template<class T>
-const nsPIDOMWindowInner*
-nsPIDOMWindow<T>::AsInner() const
-{
-  MOZ_ASSERT(IsInnerWindow());
-  return reinterpret_cast<const nsPIDOMWindowInner*>(this);
-}
-
-template<class T>
-nsPIDOMWindowOuter*
-nsPIDOMWindow<T>::AsOuter()
-{
-  MOZ_ASSERT(IsOuterWindow());
-  return reinterpret_cast<nsPIDOMWindowOuter*>(this);
-}
-
-template<class T>
-const nsPIDOMWindowOuter*
-nsPIDOMWindow<T>::AsOuter() const
-{
-  MOZ_ASSERT(IsOuterWindow());
-  return reinterpret_cast<const nsPIDOMWindowOuter*>(this);
-}
-
-template <class T>
 bool
-nsPIDOMWindow<T>::IsLoading() const
+nsPIDOMWindowOuter::IsLoading() const
 {
-  if (IsOuterWindow()) {
-    auto* win = AsOuter()->GetCurrentInnerWindow();
+  auto* win = GetCurrentInnerWindow();

-    if (!win) {
-      NS_ERROR("No current inner window available!");
+  if (!win) {
+    NS_ERROR("No current inner window available!");

-      return false;
-    }
-
-    return win->IsLoading();
+    return false;
  }

+  return win->IsLoading();
+}
+
+bool
+nsPIDOMWindowInner::IsLoading() const
+{
  if (!mOuterWindow) {
    NS_ERROR("IsLoading() called on orphan inner window!");

@ -61,22 +30,23 @@ nsPIDOMWindow<T>::IsLoading() const
  return !mIsDocumentLoaded;
 }

-template <class T>
 bool
-nsPIDOMWindow<T>::IsHandlingResizeEvent() const
+nsPIDOMWindowOuter::IsHandlingResizeEvent() const
 {
-  if (IsOuterWindow()) {
-    auto* win = AsOuter()->GetCurrentInnerWindow();
+  auto* win = GetCurrentInnerWindow();

-    if (!win) {
-      NS_ERROR("No current inner window available!");
+  if (!win) {
+    NS_ERROR("No current inner window available!");

-      return false;
-    }
-
-    return win->IsHandlingResizeEvent();
+    return false;
  }

+  return win->IsHandlingResizeEvent();
+}
+
+bool
+nsPIDOMWindowInner::IsHandlingResizeEvent() const
+{
  if (!mOuterWindow) {
    NS_ERROR("IsHandlingResizeEvent() called on orphan inner window!");

@ -107,24 +77,26 @@ nsPIDOMWindowInner::IsTopInnerWindow() const
  return mTopInnerWindow == this;
 }

-template <class T>
 nsIDocShell*
-nsPIDOMWindow<T>::GetDocShell() const
+nsPIDOMWindowOuter::GetDocShell() const
 {
-  if (mOuterWindow) {
-    return mOuterWindow->GetDocShell();
-  }
-
  return mDocShell;
 }

-template <class T>
-nsIContent*
-nsPIDOMWindow<T>::GetFocusedNode() const
+nsIDocShell*
+nsPIDOMWindowInner::GetDocShell() const
 {
-  if (IsOuterWindow()) {
-    return mInnerWindow ? mInnerWindow->GetFocusedNode() : nullptr;
-  }
+  return mOuterWindow ? mOuterWindow->GetDocShell() : nullptr;
+}

+nsIContent*
+nsPIDOMWindowOuter::GetFocusedNode() const
+{
+  return mInnerWindow ? mInnerWindow->GetFocusedNode() : nullptr;
+}
+
+nsIContent*
+nsPIDOMWindowInner::GetFocusedNode() const
+{
  return mFocusedNode;
 }
--- a/dom/base/nsScreen.cpp
+++ b/dom/base/nsScreen.cpp
@ -25,7 +25,6 @@ using namespace mozilla::dom;
 nsScreen::Create(nsPIDOMWindowInner* aWindow)
 {
  MOZ_ASSERT(aWindow);
-  MOZ_ASSERT(aWindow->IsInnerWindow());

  if (!aWindow->GetDocShell()) {
    return nullptr;
--- a/dom/base/nsWindowRoot.cpp
+++ b/dom/base/nsWindowRoot.cpp
@ -36,7 +36,6 @@ using namespace mozilla::dom;
 nsWindowRoot::nsWindowRoot(nsPIDOMWindowOuter* aWindow)
 {
  mWindow = aWindow;
-  MOZ_ASSERT(mWindow->IsOuterWindow());

  // Keyboard indicators are not shown on Mac by default.
 #if defined(XP_MACOSX)
--- a/dom/bindings/CallbackObject.cpp
+++ b/dom/bindings/CallbackObject.cpp
@ -186,7 +186,6 @@ CallbackObject::CallSetup::CallSetup(CallbackObject* aCallback,
                            ? xpc::WindowGlobalOrNull(realCallback)
                            : nullptr;
    if (win) {
-      MOZ_ASSERT(win->IsInnerWindow());
      // We don't want to run script in windows that have been navigated away
      // from.
      if (!win->AsInner()->HasActiveDocument()) {
--- a/dom/broadcastchannel/BroadcastChannel.cpp
+++ b/dom/broadcastchannel/BroadcastChannel.cpp
@ -363,7 +363,6 @@ BroadcastChannel::Constructor(const GlobalObject& aGlobal,

  if (!workerPrivate) {
    MOZ_ASSERT(window);
-    MOZ_ASSERT(window->IsInnerWindow());
    bc->mInnerID = window->WindowID();

    // Register as observer for inner-window-destroyed.
--- a/dom/canvas/CanvasRenderingContext2D.cpp
+++ b/dom/canvas/CanvasRenderingContext2D.cpp
@ -5506,8 +5506,6 @@ CanvasRenderingContext2D::DrawWindow(nsGlobalWindowInner& aWindow, double aX,
                                     const nsAString& aBgColor,
                                     uint32_t aFlags, ErrorResult& aError)
 {
-  MOZ_ASSERT(aWindow.IsInnerWindow());
-
  if (int32_t(aW) == 0 || int32_t(aH) == 0) {
    return;
  }
--- a/dom/console/Console.cpp
+++ b/dom/console/Console.cpp
@ -380,7 +380,6 @@ protected:
      return;
    }

-    MOZ_ASSERT(aWindow->IsInnerWindow());
    nsPIDOMWindowOuter* outerWindow = aWindow->GetOuterWindow();
    if (NS_WARN_IF(!outerWindow)) {
      return;
@ -822,7 +821,6 @@ Console::Console(nsPIDOMWindowInner* aWindow)
  MOZ_ASSERT_IF(NS_IsMainThread(), aWindow);

  if (mWindow) {
-    MOZ_ASSERT(mWindow->IsInnerWindow());
    mInnerID = mWindow->WindowID();

    // Without outerwindow any console message coming from this object will not
--- a/dom/events/EventListenerManager.cpp
+++ b/dom/events/EventListenerManager.cpp
@ -810,12 +810,6 @@ EventListenerManager::SetEventHandler(nsAtom* aName,
    return NS_OK;
  }

-#ifdef DEBUG
-  if (nsCOMPtr<nsPIDOMWindowInner> win = do_QueryInterface(global)) {
-    MOZ_ASSERT(win->IsInnerWindow(), "We should not have an outer window here!");
-  }
-#endif
-
  nsresult rv = NS_OK;
  // return early preventing the event listener from being added
  // 'doc' is fetched above
--- a/dom/file/Blob.cpp
+++ b/dom/file/Blob.cpp
@ -98,15 +98,6 @@ Blob::Blob(nsISupports* aParent, BlobImpl* aImpl)
  , mParent(aParent)
 {
  MOZ_ASSERT(mImpl);
-
-#ifdef DEBUG
-  {
-    nsCOMPtr<nsPIDOMWindowInner> win = do_QueryInterface(aParent);
-    if (win) {
-      MOZ_ASSERT(win->IsInnerWindow());
-    }
-  }
-#endif
 }

 Blob::~Blob()
--- a/dom/gamepad/GamepadManager.cpp
+++ b/dom/gamepad/GamepadManager.cpp
@ -135,7 +135,6 @@ void
 GamepadManager::AddListener(nsGlobalWindowInner* aWindow)
 {
  MOZ_ASSERT(aWindow);
-  MOZ_ASSERT(aWindow->IsInnerWindow());
  MOZ_ASSERT(NS_IsMainThread());

  // IPDL child has not been created
@ -181,7 +180,6 @@ void
 GamepadManager::RemoveListener(nsGlobalWindowInner* aWindow)
 {
  MOZ_ASSERT(aWindow);
-  MOZ_ASSERT(aWindow->IsInnerWindow());

  if (mShuttingDown) {
    // Doesn't matter at this point. It's possible we're being called
@ -353,9 +351,6 @@ GamepadManager::NewConnectionEvent(uint32_t aIndex, bool aConnected)

  if (aConnected) {
    for (uint32_t i = 0; i < listeners.Length(); i++) {
-
-      MOZ_ASSERT(listeners[i]->IsInnerWindow());
-
      // Only send events to non-background windows
      if (!listeners[i]->AsInner()->IsCurrentInnerWindow() ||
          listeners[i]->GetOuterWindow()->IsBackground()) {
@ -492,7 +487,6 @@ GamepadManager::SetWindowHasSeenGamepad(nsGlobalWindowInner* aWindow,
                                        bool aHasSeen)
 {
  MOZ_ASSERT(aWindow);
-  MOZ_ASSERT(aWindow->IsInnerWindow());

  if (mListeners.IndexOf(aWindow) == NoIndex) {
    // This window isn't even listening for gamepad events.
@ -549,8 +543,6 @@ GamepadManager::Update(const GamepadChangeEvent& aEvent)
  nsTArray<RefPtr<nsGlobalWindowInner>> listeners(mListeners);

  for (uint32_t i = 0; i < listeners.Length(); i++) {
-    MOZ_ASSERT(listeners[i]->IsInnerWindow());
-
    // Only send events to non-background windows
    if (!listeners[i]->AsInner()->IsCurrentInnerWindow() ||
        listeners[i]->GetOuterWindow()->IsBackground()) {
--- a/dom/html/nsGenericHTMLFrameElement.cpp
+++ b/dom/html/nsGenericHTMLFrameElement.cpp
@ -129,9 +129,6 @@ nsGenericHTMLFrameElement::GetContentWindow()
    return nullptr;
  }

-  NS_ASSERTION(win->IsOuterWindow(),
-               "Uh, this window should always be an outer window!");
-
  return win.forget();
 }

--- a/dom/html/nsHTMLDocument.cpp
+++ b/dom/html/nsHTMLDocument.cpp
@ -3665,6 +3665,9 @@ nsHTMLDocument::DocAddSizeOfExcludingThis(nsWindowSizes& aWindowSizes) const
 bool
 nsHTMLDocument::WillIgnoreCharsetOverride()
 {
+  if (mEncodingMenuDisabled) {
+    return true;
+  }
  if (mType != eHTML) {
    MOZ_ASSERT(mType == eXHTML);
    return true;
--- a/dom/interfaces/base/nsIDOMChromeWindow.idl
+++ b/dom/interfaces/base/nsIDOMChromeWindow.idl
@ -32,20 +32,4 @@ interface nsIDOMChromeWindow : nsISupports
   */
  [noscript]
  nsIMessageBroadcaster getGroupMessageManager(in AString group);
-
-  /**
-   * These methods provide a way to specify the opener value for the content in
-   * the window before the content itself is created. This is important in order
-   * to set the DocGroup of a document, as the opener must be set before the
-   * document is created.
-   *
-   * SetOpenerForInitialContentBrowser is used to set which opener will be used,
-   * and TakeOpenerForInitialContentBrowser is used by nsXULElement in order to
-   * take the value set earlier, and null out the value in the
-   * nsIDOMChromeWindow.
-   */
-  [noscript]
-  void setOpenerForInitialContentBrowser(in mozIDOMWindowProxy aOpener);
-  [noscript]
-  mozIDOMWindowProxy takeOpenerForInitialContentBrowser();
 };
--- a/dom/media/MediaRecorder.cpp
+++ b/dom/media/MediaRecorder.cpp
@ -1248,7 +1248,6 @@ MediaRecorder::MediaRecorder(DOMMediaStream& aSourceMediaStream,
  , mState(RecordingState::Inactive)
 {
  MOZ_ASSERT(aOwnerWindow);
-  MOZ_ASSERT(aOwnerWindow->IsInnerWindow());
  mDOMStream = &aSourceMediaStream;

  RegisterActivityObserver();
@ -1262,7 +1261,6 @@ MediaRecorder::MediaRecorder(AudioNode& aSrcAudioNode,
  , mState(RecordingState::Inactive)
 {
  MOZ_ASSERT(aOwnerWindow);
-  MOZ_ASSERT(aOwnerWindow->IsInnerWindow());

  mAudioNode = &aSrcAudioNode;

--- a/dom/media/webspeech/recognition/SpeechRecognition.cpp
+++ b/dom/media/webspeech/recognition/SpeechRecognition.cpp
@ -195,7 +195,6 @@ SpeechRecognition::Constructor(const GlobalObject& aGlobal,
    return nullptr;
  }

-  MOZ_ASSERT(win->IsInnerWindow());
  RefPtr<SpeechRecognition> object = new SpeechRecognition(win);
  return object.forget();
 }
--- a/dom/media/webspeech/synth/SpeechSynthesis.cpp
+++ b/dom/media/webspeech/synth/SpeechSynthesis.cpp
@ -61,7 +61,6 @@ SpeechSynthesis::SpeechSynthesis(nsPIDOMWindowInner* aParent)
  , mHoldQueue(false)
  , mInnerID(aParent->WindowID())
 {
-  MOZ_ASSERT(aParent->IsInnerWindow());
  MOZ_ASSERT(NS_IsMainThread());

  nsCOMPtr<nsIObserverService> obs = mozilla::services::GetObserverService();
--- a/dom/media/webspeech/synth/SpeechSynthesisUtterance.cpp
+++ b/dom/media/webspeech/synth/SpeechSynthesisUtterance.cpp
@ -72,7 +72,6 @@ SpeechSynthesisUtterance::Constructor(GlobalObject& aGlobal,
    return nullptr;
  }

-  MOZ_ASSERT(win->IsInnerWindow());
  RefPtr<SpeechSynthesisUtterance> object =
    new SpeechSynthesisUtterance(win, aText);
  return object.forget();
--- a/dom/messagechannel/MessagePort.cpp
+++ b/dom/messagechannel/MessagePort.cpp
@ -337,7 +337,6 @@ MessagePort::Initialize(const nsID& aUUID,
    mWorkerHolder = Move(workerHolder);
  } else if (GetOwner()) {
    MOZ_ASSERT(NS_IsMainThread());
-    MOZ_ASSERT(GetOwner()->IsInnerWindow());
    mInnerID = GetOwner()->WindowID();

    nsCOMPtr<nsIObserverService> obs = mozilla::services::GetObserverService();
--- a/dom/network/UDPSocket.cpp
+++ b/dom/network/UDPSocket.cpp
@ -123,7 +123,6 @@ UDPSocket::UDPSocket(nsPIDOMWindowInner* aOwner,
  , mReadyState(SocketReadyState::Opening)
 {
  MOZ_ASSERT(aOwner);
-  MOZ_ASSERT(aOwner->IsInnerWindow());

  nsIDocument* aDoc = aOwner->GetExtantDoc();
  if (aDoc) {
--- a/dom/performance/PerformanceObserver.cpp
+++ b/dom/performance/PerformanceObserver.cpp
@ -82,7 +82,6 @@ PerformanceObserver::Constructor(const GlobalObject& aGlobal,
      aRv.Throw(NS_ERROR_FAILURE);
      return nullptr;
    }
-    MOZ_ASSERT(ownerWindow->IsInnerWindow());

    RefPtr<PerformanceObserver> observer =
      new PerformanceObserver(ownerWindow, aCb);
--- a/dom/storage/Storage.cpp
+++ b/dom/storage/Storage.cpp
@ -38,11 +38,17 @@ Storage::Storage(nsPIDOMWindowInner* aWindow, nsIPrincipal* aPrincipal)
 Storage::~Storage()
 {}

+/* static */ bool
+Storage::StoragePrefIsEnabled()
+{
+  return mozilla::Preferences::GetBool(kStorageEnabled);
+}
+
 bool
 Storage::CanUseStorage(nsIPrincipal& aSubjectPrincipal)
 {
  // This method is responsible for correct setting of mIsSessionOnly.
-  if (!mozilla::Preferences::GetBool(kStorageEnabled)) {
+  if (!StoragePrefIsEnabled()) {
    return false;
  }

--- a/dom/storage/Storage.h
+++ b/dom/storage/Storage.h
@ -32,6 +32,8 @@ public:

  Storage(nsPIDOMWindowInner* aWindow, nsIPrincipal* aPrincipal);

+  static bool StoragePrefIsEnabled();
+
  enum StorageType {
    eSessionStorage,
    eLocalStorage,
--- a/dom/vr/VREventObserver.cpp
+++ b/dom/vr/VREventObserver.cpp
@ -27,7 +27,7 @@ VREventObserver::VREventObserver(nsGlobalWindowInner* aGlobalWindow)
  , mIs2DView(true)
  , mHasReset(false)
 {
-  MOZ_ASSERT(aGlobalWindow && aGlobalWindow->IsInnerWindow());
+  MOZ_ASSERT(aGlobalWindow);

  UpdateSpentTimeIn2DTelemetry(false);
  VRManagerChild* vmc = VRManagerChild::Get();
--- a/dom/websocket/WebSocket.cpp
+++ b/dom/websocket/WebSocket.cpp
@ -1278,8 +1278,6 @@ WebSocket::ConstructorCommon(const GlobalObject& aGlobal,
    }
  }

-  MOZ_ASSERT_IF(ownerWindow, ownerWindow->IsInnerWindow());
-
  nsTArray<nsString> protocolArray;

  for (uint32_t index = 0, len = aProtocols.Length(); index < len; ++index) {
--- a/dom/workers/ServiceWorkerClients.cpp
+++ b/dom/workers/ServiceWorkerClients.cpp
@ -382,7 +382,6 @@ public:
    MOZ_ASSERT(aPromiseProxy);
    MOZ_ASSERT(aServiceWorkerPrivate);
    MOZ_ASSERT(aWindow);
-    MOZ_ASSERT(aWindow->IsOuterWindow());
    MOZ_ASSERT(aBaseURI);
    AssertIsOnMainThread();

--- a/dom/workers/ServiceWorkerRegistration.cpp
+++ b/dom/workers/ServiceWorkerRegistration.cpp
@ -220,7 +220,6 @@ ServiceWorkerRegistrationMainThread::ServiceWorkerRegistrationMainThread(nsPIDOM
 {
  AssertIsOnMainThread();
  MOZ_ASSERT(aWindow);
-  MOZ_ASSERT(aWindow->IsInnerWindow());
  StartListeningForEvents();
 }

--- a/dom/workers/ServiceWorkerWindowClient.cpp
+++ b/dom/workers/ServiceWorkerWindowClient.cpp
@ -216,7 +216,6 @@ public:
    MOZ_ASSERT(aPromiseProxy);
    MOZ_ASSERT(aServiceWorkerPrivate);
    MOZ_ASSERT(aWindow);
-    MOZ_ASSERT(aWindow->IsOuterWindow());
    MOZ_ASSERT(aBaseURI);
    AssertIsOnMainThread();

--- a/dom/workers/WorkerPrivate.cpp
+++ b/dom/workers/WorkerPrivate.cpp
@ -2848,8 +2848,6 @@ WorkerPrivateParent<Derived>::WorkerPrivateParent(

  if (aLoadInfo.mWindow) {
    AssertIsOnMainThread();
-    MOZ_ASSERT(aLoadInfo.mWindow->IsInnerWindow(),
-               "Should have inner window here!");
    BindToOwner(aLoadInfo.mWindow);
  }

--- a/dom/xhr/XMLHttpRequestMainThread.h
+++ b/dom/xhr/XMLHttpRequestMainThread.h
@ -203,7 +203,6 @@ public:
    MOZ_ASSERT(aPrincipal);
    nsCOMPtr<nsPIDOMWindowInner> win = do_QueryInterface(aGlobalObject);
    if (win) {
-      MOZ_ASSERT(win->IsInnerWindow());
      if (win->GetExtantDoc()) {
        mStyleBackend = win->GetExtantDoc()->GetStyleBackendType();
      }
--- a/dom/xul/nsXULElement.cpp
+++ b/dom/xul/nsXULElement.cpp
@ -1465,13 +1465,10 @@ nsXULElement::LoadSrc()
        nsCOMPtr<nsPIDOMWindowOuter> opener = do_QueryInterface(slots->mFrameLoaderOrOpener);
        if (!opener) {
            // If we are a primary xul-browser, we want to take the opener property!
-            nsCOMPtr<nsIDOMChromeWindow> chromeWindow = do_QueryInterface(OwnerDoc()->GetWindow());
+            nsCOMPtr<nsPIDOMWindowOuter> window = OwnerDoc()->GetWindow();
            if (AttrValueIs(kNameSpaceID_None, nsGkAtoms::primary,
-                            nsGkAtoms::_true, eIgnoreCase) &&
-                chromeWindow) {
-                nsCOMPtr<mozIDOMWindowProxy> wp;
-                chromeWindow->TakeOpenerForInitialContentBrowser(getter_AddRefs(wp));
-                opener = nsPIDOMWindowOuter::From(wp);
+                            nsGkAtoms::_true, eIgnoreCase) && window) {
+                opener = window->TakeOpenerForInitialContentBrowser();
            }
        }

--- a/gfx/2d/ScaledFontBase.cpp
+++ b/gfx/2d/ScaledFontBase.cpp
@ -281,7 +281,7 @@ ScaledFontBase::GetGlyphDesignMetrics(const uint16_t* aGlyphs, uint32_t aNumGlyp
      }
      cairo_font_options_destroy(options);
    }
-
+    return;
  }
 #endif

--- a/gfx/2d/ScaledFontDWrite.cpp
+++ b/gfx/2d/ScaledFontDWrite.cpp
@ -196,7 +196,9 @@ ScaledFontDWrite::CopyGlyphsToBuilder(const GlyphBuffer &aBuffer, PathBuilder *a
 }

 void
-ScaledFontDWrite::GetGlyphDesignMetrics(const uint16_t* aGlyphs, uint32_t aNumGlyphs, GlyphMetrics* aGlyphMetrics)
+ScaledFontDWrite::GetGlyphDesignMetrics(const uint16_t* aGlyphs,
+                                        uint32_t aNumGlyphs,
+                                        GlyphMetrics* aGlyphMetrics)
 {
  DWRITE_FONT_METRICS fontMetrics;
  mFontFace->GetMetrics(&fontMetrics);
@ -204,16 +206,20 @@ ScaledFontDWrite::GetGlyphDesignMetrics(const uint16_t* aGlyphs, uint32_t aNumGl
  vector<DWRITE_GLYPH_METRICS> metrics(aNumGlyphs);
  mFontFace->GetDesignGlyphMetrics(aGlyphs, aNumGlyphs, &metrics.front());

-  Float designUnitCorrection = 1.f / fontMetrics.designUnitsPerEm;
+  Float scaleFactor = mSize / fontMetrics.designUnitsPerEm;

  for (uint32_t i = 0; i < aNumGlyphs; i++) {
-    aGlyphMetrics[i].mXBearing = metrics[i].leftSideBearing * designUnitCorrection * mSize;
-    aGlyphMetrics[i].mXAdvance = metrics[i].advanceWidth * designUnitCorrection * mSize;
-    aGlyphMetrics[i].mYBearing = metrics[i].topSideBearing * designUnitCorrection * mSize;
-    aGlyphMetrics[i].mYAdvance = metrics[i].advanceHeight * designUnitCorrection * mSize;
-    aGlyphMetrics[i].mWidth = (metrics[i].advanceHeight - metrics[i].topSideBearing - metrics[i].bottomSideBearing) *
-                              designUnitCorrection * mSize;
-    aGlyphMetrics[i].mHeight = (metrics[i].topSideBearing - metrics[i].verticalOriginY) * designUnitCorrection * mSize;
+    aGlyphMetrics[i].mXBearing = metrics[i].leftSideBearing * scaleFactor;
+    aGlyphMetrics[i].mXAdvance = metrics[i].advanceWidth * scaleFactor;
+    aGlyphMetrics[i].mYBearing = (metrics[i].topSideBearing -
+                                  metrics[i].verticalOriginY) * scaleFactor;
+    aGlyphMetrics[i].mYAdvance = metrics[i].advanceHeight * scaleFactor;
+    aGlyphMetrics[i].mWidth = (metrics[i].advanceWidth -
+                               metrics[i].leftSideBearing -
+                               metrics[i].rightSideBearing) * scaleFactor;
+    aGlyphMetrics[i].mHeight = (metrics[i].advanceHeight -
+                                metrics[i].topSideBearing -
+                                metrics[i].bottomSideBearing) * scaleFactor;
  }
 }

--- a/gfx/thebes/gfxFont.cpp
+++ b/gfx/thebes/gfxFont.cpp
@ -3481,7 +3481,8 @@ gfxFont::SetupGlyphExtents(DrawTarget* aDrawTarget, uint32_t aGlyphID,
 {
    gfxRect svgBounds;
    if (mFontEntry->TryGetSVGData(this) && mFontEntry->HasSVGGlyph(aGlyphID) &&
-        mFontEntry->GetSVGGlyphExtents(aDrawTarget, aGlyphID, &svgBounds)) {
+        mFontEntry->GetSVGGlyphExtents(aDrawTarget, aGlyphID,
+                                       GetAdjustedSize(), &svgBounds)) {
        gfxFloat d2a = aExtents->GetAppUnitsPerDevUnit();
        aExtents->SetTightGlyphExtents(aGlyphID,
                                       gfxRect(svgBounds.x * d2a,
@ -3491,20 +3492,22 @@ gfxFont::SetupGlyphExtents(DrawTarget* aDrawTarget, uint32_t aGlyphID,
        return;
    }

-    cairo_glyph_t glyph;
-    glyph.index = aGlyphID;
-    glyph.x = 0;
-    glyph.y = 0;
-    cairo_text_extents_t extents;
-    cairo_glyph_extents(gfxFont::RefCairo(aDrawTarget), &glyph, 1, &extents);
+    RefPtr<ScaledFont> sf = GetScaledFont(aDrawTarget);
+    uint16_t glyphIndex = aGlyphID;
+    GlyphMetrics metrics;
+    if (mAntialiasOption == kAntialiasNone) {
+        sf->GetGlyphDesignMetrics(&glyphIndex, 1, &metrics);
+    } else {
+        aDrawTarget->GetGlyphRasterizationMetrics(sf, &glyphIndex, 1, &metrics);
+    }

    const Metrics& fontMetrics = GetMetrics(eHorizontal);
    int32_t appUnitsPerDevUnit = aExtents->GetAppUnitsPerDevUnit();
-    if (!aNeedTight && extents.x_bearing >= 0 &&
-        extents.y_bearing >= -fontMetrics.maxAscent &&
-        extents.height + extents.y_bearing <= fontMetrics.maxDescent) {
+    if (!aNeedTight && metrics.mXBearing >= 0.0 &&
+        metrics.mYBearing >= -fontMetrics.maxAscent &&
+        metrics.mHeight + metrics.mYBearing <= fontMetrics.maxDescent) {
        uint32_t appUnitsWidth =
-            uint32_t(ceil((extents.x_bearing + extents.width)*appUnitsPerDevUnit));
+            uint32_t(ceil((metrics.mXBearing + metrics.mWidth)*appUnitsPerDevUnit));
        if (appUnitsWidth < gfxGlyphExtents::INVALID_WIDTH) {
            aExtents->SetContainedGlyphWidthAppUnits(aGlyphID, uint16_t(appUnitsWidth));
            return;
@ -3517,8 +3520,8 @@ gfxFont::SetupGlyphExtents(DrawTarget* aDrawTarget, uint32_t aGlyphID,
 #endif

    gfxFloat d2a = appUnitsPerDevUnit;
-    gfxRect bounds(extents.x_bearing*d2a, extents.y_bearing*d2a,
-                   extents.width*d2a, extents.height*d2a);
+    gfxRect bounds(metrics.mXBearing * d2a, metrics.mYBearing * d2a,
+                   metrics.mWidth * d2a, metrics.mHeight * d2a);
    aExtents->SetTightGlyphExtents(aGlyphID, bounds);
 }

--- a/gfx/thebes/gfxFontEntry.cpp
+++ b/gfx/thebes/gfxFontEntry.cpp
@ -34,8 +34,6 @@
 #include "gfxSVGGlyphs.h"
 #include "gfx2DGlue.h"

-#include "cairo.h"
-
 #include "harfbuzz/hb.h"
 #include "harfbuzz/hb-ot.h"
 #include "graphite2/Font.h"
@ -319,22 +317,15 @@ gfxFontEntry::HasSVGGlyph(uint32_t aGlyphId)

 bool
 gfxFontEntry::GetSVGGlyphExtents(DrawTarget* aDrawTarget, uint32_t aGlyphId,
-                                 gfxRect *aResult)
+                                 gfxFloat aSize, gfxRect* aResult)
 {
    MOZ_ASSERT(mSVGInitialized,
               "SVG data has not yet been loaded. TryGetSVGData() first.");
    MOZ_ASSERT(mUnitsPerEm >= kMinUPEM && mUnitsPerEm <= kMaxUPEM,
               "font has invalid unitsPerEm");

-    cairo_matrix_t fontMatrix;
-    cairo_get_font_matrix(gfxFont::RefCairo(aDrawTarget), &fontMatrix);
-
-    gfxMatrix svgToAppSpace(fontMatrix.xx, fontMatrix.yx,
-                            fontMatrix.xy, fontMatrix.yy,
-                            fontMatrix.x0, fontMatrix.y0);
-    svgToAppSpace.PreScale(1.0f / mUnitsPerEm, 1.0f / mUnitsPerEm);
-
-    return mSVGGlyphs->GetGlyphExtents(aGlyphId, svgToAppSpace, aResult);
+    gfxMatrix svgToApp(aSize / mUnitsPerEm, 0, 0, aSize / mUnitsPerEm, 0, 0);
+    return mSVGGlyphs->GetGlyphExtents(aGlyphId, svgToApp, aResult);
 }

 void
--- a/gfx/thebes/gfxFontEntry.h
+++ b/gfx/thebes/gfxFontEntry.h
@ -205,7 +205,7 @@ public:
    bool TryGetSVGData(gfxFont* aFont);
    bool HasSVGGlyph(uint32_t aGlyphId);
    bool GetSVGGlyphExtents(DrawTarget* aDrawTarget, uint32_t aGlyphId,
-                            gfxRect *aResult);
+                            gfxFloat aSize, gfxRect* aResult);
    void RenderSVGGlyph(gfxContext *aContext, uint32_t aGlyphId,
                        mozilla::SVGContextPaint* aContextPaint);
    // Call this when glyph geometry or rendering has changed
--- a/gfx/thebes/gfxGDIFont.cpp
+++ b/gfx/thebes/gfxGDIFont.cpp
@ -191,28 +191,11 @@ gfxGDIFont::Initialize()

    LOGFONTW logFont;

-    // Figure out if we want to do synthetic oblique styling.
-    GDIFontEntry* fe = static_cast<GDIFontEntry*>(GetFontEntry());
-    bool wantFakeItalic = mStyle.style != NS_FONT_STYLE_NORMAL &&
-                          fe->IsUpright() && mStyle.allowSyntheticStyle;
-
-    // If the font's family has an actual italic face (but font matching
-    // didn't choose it), we have to use a cairo transform instead of asking
-    // GDI to italicize, because that would use a different face and result
-    // in a possible glyph ID mismatch between shaping and rendering.
-    //
-    // We use the mFamilyHasItalicFace flag in the entry in case of user fonts,
-    // where the *CSS* family may not know about italic faces that are present
-    // in the *GDI* family, and which GDI would use if we asked it to perform
-    // the "italicization".
-    bool useCairoFakeItalic = wantFakeItalic && fe->mFamilyHasItalicFace;
-
    if (mAdjustedSize == 0.0) {
        mAdjustedSize = mStyle.size;
        if (mStyle.sizeAdjust > 0.0 && mAdjustedSize > 0.0) {
            // to implement font-size-adjust, we first create the "unadjusted" font
-            FillLogFont(logFont, mAdjustedSize,
-                        wantFakeItalic && !useCairoFakeItalic);
+            FillLogFont(logFont, mAdjustedSize);
            mFont = ::CreateFontIndirectW(&logFont);

            // initialize its metrics so we can calculate size adjustment
@ -245,7 +228,7 @@ gfxGDIFont::Initialize()

    // this may end up being zero
    mAdjustedSize = ROUND(mAdjustedSize);
-    FillLogFont(logFont, mAdjustedSize, wantFakeItalic && !useCairoFakeItalic);
+    FillLogFont(logFont, mAdjustedSize);
    mFont = ::CreateFontIndirectW(&logFont);

    mMetrics = new gfxFont::Metrics;
@ -458,8 +441,7 @@ gfxGDIFont::Initialize()
 }

 void
-gfxGDIFont::FillLogFont(LOGFONTW& aLogFont, gfxFloat aSize,
-                        bool aUseGDIFakeItalic)
+gfxGDIFont::FillLogFont(LOGFONTW& aLogFont, gfxFloat aSize)
 {
    GDIFontEntry *fe = static_cast<GDIFontEntry*>(GetFontEntry());

@ -480,11 +462,6 @@ gfxGDIFont::FillLogFont(LOGFONTW& aLogFont, gfxFloat aSize,
    }

    fe->FillLogFont(&aLogFont, weight, aSize);
-
-    // If GDI synthetic italic is wanted, force the lfItalic field to true
-    if (aUseGDIFakeItalic) {
-        aLogFont.lfItalic = 1;
-    }
 }

 uint32_t
--- a/Show More
+++ b/Show More