diff --git a/browser/devtools/debugger/debugger-panes.js b/browser/devtools/debugger/debugger-panes.js
index 1c938ab549f1..5be8ccfa5640 100644
--- a/browser/devtools/debugger/debugger-panes.js
+++ b/browser/devtools/debugger/debugger-panes.js
@@ -404,7 +404,8 @@ SourcesView.prototype = Heritage.extend(WidgetMethods, {
 
     DebuggerController.SourceScripts.togglePrettyPrint(source)
       .then(resetEditor, printError)
-      .then(DebuggerView.showEditor);
+      .then(DebuggerView.showEditor)
+      .then(this.updateToolbarButtonsState);
   },
 
   /**
diff --git a/browser/devtools/debugger/test/browser.ini b/browser/devtools/debugger/test/browser.ini
index 592bbcaec10b..76edfd4c1061 100644
--- a/browser/devtools/debugger/test/browser.ini
+++ b/browser/devtools/debugger/test/browser.ini
@@ -128,6 +128,7 @@ skip-if = true
 [browser_dbg_pretty-print-09.js]
 [browser_dbg_pretty-print-10.js]
 [browser_dbg_pretty-print-11.js]
+[browser_dbg_pretty-print-12.js]
 [browser_dbg_progress-listener-bug.js]
 [browser_dbg_reload-preferred-script-01.js]
 [browser_dbg_reload-preferred-script-02.js]
diff --git a/browser/devtools/debugger/test/browser_dbg_pretty-print-12.js b/browser/devtools/debugger/test/browser_dbg_pretty-print-12.js
new file mode 100644
index 000000000000..16b9941e7e83
--- /dev/null
+++ b/browser/devtools/debugger/test/browser_dbg_pretty-print-12.js
@@ -0,0 +1,54 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+/**
+ * Make sure that we don't leave the pretty print button checked when we fail to
+ * pretty print a source (because it isn't a JS file, for example).
+ */
+
+const TAB_URL = EXAMPLE_URL + "doc_blackboxing.html";
+
+let gTab, gDebuggee, gPanel, gDebugger;
+let gEditor, gSources;
+
+function test() {
+  initDebugger(TAB_URL).then(([aTab, aDebuggee, aPanel]) => {
+    gTab = aTab;
+    gDebuggee = aDebuggee;
+    gPanel = aPanel;
+    gDebugger = gPanel.panelWin;
+    gEditor = gDebugger.DebuggerView.editor;
+    gSources = gDebugger.DebuggerView.Sources;
+
+    waitForSourceShown(gPanel, "")
+      .then(() => {
+        let shown = ensureSourceIs(gPanel, TAB_URL, true)
+        gSources.selectedValue = TAB_URL;
+        return shown;
+      })
+      .then(clickPrettyPrintButton)
+      .then(testButtonIsntChecked)
+      .then(() => closeDebuggerAndFinish(gPanel))
+      .then(null, aError => {
+        ok(false, "Got an error: " + DevToolsUtils.safeErrorString(aError));
+      });
+  });
+}
+
+function clickPrettyPrintButton() {
+  gDebugger.document.getElementById("pretty-print").click();
+}
+
+function testButtonIsntChecked() {
+  is(gDebugger.document.getElementById("pretty-print").checked, false,
+     "The button shouldn't be checked after trying to pretty print a non-js file.");
+}
+
+registerCleanupFunction(function() {
+  gTab = null;
+  gDebuggee = null;
+  gPanel = null;
+  gDebugger = null;
+  gEditor = null;
+  gSources = null;
+});
diff --git a/browser/metro/base/content/ContextCommands.js b/browser/metro/base/content/ContextCommands.js
index 338a75f1c695..04325807a58b 100644
--- a/browser/metro/base/content/ContextCommands.js
+++ b/browser/metro/base/content/ContextCommands.js
@@ -170,9 +170,8 @@ var ContextCommands = {
   // Link specific
 
   openLinkInNewTab: function cc_openLinkInNewTab() {
-    let tab = Browser.addTab(ContextMenuUI.popupState.linkURL, false, Browser.selectedTab);
-    ContextUI.peekTabs(kOpenInNewTabAnimationDelayMsec);
-    Elements.tabList.strip.ensureElementIsVisible(tab.chromeTab);
+    let url = ContextMenuUI.popupState.linkURL;
+    BrowserUI.openLinkInNewTab(url, false, Browser.selectedTab);
   },
 
   copyLink: function cc_copyLink() {
diff --git a/browser/metro/base/content/ContextUI.js b/browser/metro/base/content/ContextUI.js
index 338df3969e41..144811a61054 100644
--- a/browser/metro/base/content/ContextUI.js
+++ b/browser/metro/base/content/ContextUI.js
@@ -161,7 +161,7 @@ var ContextUI = {
    * Dismiss tab bar after a delay. Fires context ui events.
    */
   dismissTabsWithDelay: function (aDelay) {
-    aDelay = aDelay || kNewTabAnimationDelayMsec;
+    aDelay = aDelay || kForegroundTabAnimationDelay;
     this._clearDelayedTimeout();
     this._hidingId = setTimeout(function () {
         ContextUI.dismissTabs();
diff --git a/browser/metro/base/content/apzc.js b/browser/metro/base/content/apzc.js
index 59b26775f22f..42a87d34d735 100644
--- a/browser/metro/base/content/apzc.js
+++ b/browser/metro/base/content/apzc.js
@@ -39,6 +39,9 @@ var APZCObserver = {
   handleEvent: function APZC_handleEvent(aEvent) {
     switch (aEvent.type) {
       case 'pageshow':
+        if (aEvent.target != Browser.selectedBrowser.contentDocument)
+          break;
+        // fall through to TabSelect:
       case 'TabSelect':
         // ROOT_ID doesn't really identify the view we want. When we call
         // this on a content document (tab),  findElementWithViewId will
diff --git a/browser/metro/base/content/browser-scripts.js b/browser/metro/base/content/browser-scripts.js
index e8e69f2b053e..b3bc91365f1c 100644
--- a/browser/metro/base/content/browser-scripts.js
+++ b/browser/metro/base/content/browser-scripts.js
@@ -66,6 +66,9 @@ XPCOMUtils.defineLazyServiceGetter(window, "gFaviconService",
 XPCOMUtils.defineLazyServiceGetter(window, "gFocusManager",
                                    "@mozilla.org/focus-manager;1",
                                    "nsIFocusManager");
+XPCOMUtils.defineLazyServiceGetter(window, "gEventListenerService",
+                                   "@mozilla.org/eventlistenerservice;1",
+                                   "nsIEventListenerService");
 #ifdef MOZ_CRASHREPORTER
 XPCOMUtils.defineLazyServiceGetter(this, "CrashReporter",
                                    "@mozilla.org/xre/app-info;1",
diff --git a/browser/metro/base/content/browser-ui.js b/browser/metro/base/content/browser-ui.js
index da09eb7e75fd..dfdb50fe67fa 100644
--- a/browser/metro/base/content/browser-ui.js
+++ b/browser/metro/base/content/browser-ui.js
@@ -14,12 +14,12 @@ Cu.import("resource://gre/modules/devtools/dbg-server.jsm")
 const debugServerStateChanged = "devtools.debugger.remote-enabled";
 const debugServerPortChanged = "devtools.debugger.remote-port";
 
-// delay when showing the tab bar briefly after a new (empty) tab opens
-const kNewTabAnimationDelayMsec = 1000;
-// delay when showing the tab bar after opening a link on a new tab
-const kOpenInNewTabAnimationDelayMsec = 3000;
-// delay before closing tab bar after selecting another tab
-const kSelectTabAnimationDelayMsec = 500;
+// delay when showing the tab bar briefly after a new foreground tab opens
+const kForegroundTabAnimationDelay = 1000;
+// delay when showing the tab bar after opening a new background tab opens
+const kBackgroundTabAnimationDelay = 3000;
+// delay before closing tab bar after closing or selecting a tab
+const kChangeTabAnimationDelay = 500;
 
 /**
  * Cache of commonly used elements.
@@ -173,6 +173,14 @@ var BrowserUI = {
   },
 
   uninit: function() {
+    messageManager.removeMessageListener("DOMTitleChanged", this);
+    messageManager.removeMessageListener("DOMWillOpenModalDialog", this);
+    messageManager.removeMessageListener("DOMWindowClose", this);
+
+    messageManager.removeMessageListener("Browser:OpenURI", this);
+    messageManager.removeMessageListener("Browser:SaveAs:Return", this);
+    messageManager.removeMessageListener("Content:StateChange", this);
+
     messageManager.removeMessageListener("Browser:MozApplicationManifest", OfflineApps);
     Services.obs.removeObserver(this, "handle-xul-text-link");
 
@@ -180,7 +188,6 @@ var BrowserUI = {
     FlyoutPanelsUI.uninit();
     MetroDownloadsView.uninit();
     SettingsCharm.uninit();
-    messageManager.removeMessageListener("Content:StateChange", this);
     PageThumbs.uninit();
     this.stopDebugServer();
   },
@@ -436,10 +443,25 @@ var BrowserUI = {
    * See Browser.addTab for more documentation.
    */
   addAndShowTab: function (aURI, aOwner) {
-    ContextUI.peekTabs(kNewTabAnimationDelayMsec);
+    ContextUI.peekTabs(kForegroundTabAnimationDelay);
     return Browser.addTab(aURI || kStartURI, true, aOwner);
   },
 
+  /**
+   * Open a new tab in response to clicking a link in an existing tab.
+   * See Browser.addTab for more documentation.
+   */
+  openLinkInNewTab: function (aURI, aBringFront, aOwner) {
+    ContextUI.peekTabs(aBringFront ? kForegroundTabAnimationDelay
+                                   : kBackgroundTabAnimationDelay);
+    let tab = Browser.addTab(aURI, aBringFront, aOwner, {
+      referrerURI: aOwner.browser.documentURI,
+      charset: aOwner.browser.characterSet,
+    });
+    Elements.tabList.strip.ensureElementIsVisible(tab.chromeTab);
+    return tab;
+  },
+
   setOnTabAnimationEnd: function setOnTabAnimationEnd(aCallback) {
     Elements.tabs.addEventListener("animationend", function onAnimationEnd() {
       Elements.tabs.removeEventListener("animationend", onAnimationEnd);
@@ -464,7 +486,7 @@ var BrowserUI = {
     this.setOnTabAnimationEnd(function() {
       Browser.closeTab(tabToClose, { forceClose: true } );
       if (wasCollapsed)
-        ContextUI.dismissTabsWithDelay(kNewTabAnimationDelayMsec);
+        ContextUI.dismissTabsWithDelay(kChangeTabAnimationDelay);
     });
   },
 
@@ -506,7 +528,7 @@ var BrowserUI = {
 
   selectTabAndDismiss: function selectTabAndDismiss(aTab) {
     this.selectTab(aTab);
-    ContextUI.dismissTabsWithDelay(kSelectTabAnimationDelayMsec);
+    ContextUI.dismissTabsWithDelay(kChangeTabAnimationDelay);
   },
 
   selectTabAtIndex: function selectTabAtIndex(aIndex) {
diff --git a/browser/metro/base/content/browser.js b/browser/metro/base/content/browser.js
index 38446501ff0b..3e4b0e7982b4 100644
--- a/browser/metro/base/content/browser.js
+++ b/browser/metro/base/content/browser.js
@@ -79,6 +79,7 @@ var Browser = {
     // Call InputSourceHelper first so global listeners get called before
     // we start processing input in TouchModule.
     InputSourceHelper.init();
+    ClickEventHandler.init();
 
     TouchModule.init();
     GestureModule.init();
@@ -213,6 +214,7 @@ var Browser = {
   shutdown: function shutdown() {
     APZCObserver.shutdown();
     BrowserUI.uninit();
+    ClickEventHandler.uninit();
     ContentAreaObserver.shutdown();
     Appbar.shutdown();
 
@@ -485,7 +487,7 @@ var Browser = {
     if (aBringFront)
       this.selectedTab = newTab;
 
-    this._announceNewTab(newTab, params, aBringFront);
+    this._announceNewTab(newTab);
     return newTab;
   },
 
@@ -511,7 +513,7 @@ var Browser = {
    * helper for addTab related methods. Fires events related to
    * new tab creation.
    */
-  _announceNewTab: function _announceNewTab(aTab, aParams, aBringFront) {
+  _announceNewTab: function (aTab) {
     let event = document.createEvent("UIEvents");
     event.initUIEvent("TabOpen", true, false, window, 0);
     aTab.chromeTab.dispatchEvent(event);
@@ -1074,12 +1076,7 @@ nsBrowserAccess.prototype = {
 
     if (openAction == Ci.nsIBrowserDOMWindow.OPEN_NEWTAB) {
       let owner = isExternal ? null : Browser.selectedTab;
-      let tab = Browser.addTab("about:blank", true, owner);
-      // Link clicks in content need to trigger peek tab functionality
-      ContextUI.peekTabs(kOpenInNewTabAnimationDelayMsec);
-      if (isExternal) {
-        tab.closeOnExit = true;
-      }
+      let tab = BrowserUI.openLinkInNewTab("about:blank", true, owner);
       browser = tab.browser;
     } else {
       browser = Browser.selectedBrowser;
@@ -1580,3 +1577,68 @@ function rendererFactory(aBrowser, aCanvas) {
 
   return wrapper;
 };
+
+// Based on ClickEventHandler from /browser/base/content/content.js
+let ClickEventHandler = {
+  init: function () {
+    gEventListenerService.addSystemEventListener(Elements.browsers, "click", this, true);
+  },
+
+  uninit: function () {
+    gEventListenerService.removeSystemEventListener(Elements.browsers, "click", this, true);
+  },
+
+  handleEvent: function (aEvent) {
+    if (!aEvent.isTrusted || aEvent.defaultPrevented) {
+      return;
+    }
+    let [href, node] = this._hrefAndLinkNodeForClickEvent(aEvent);
+    if (href && (aEvent.button == 1 || aEvent.ctrlKey)) {
+      // Open link in a new tab for middle-click or ctrl-click
+      BrowserUI.openLinkInNewTab(href, aEvent.shiftKey, Browser.selectedTab);
+    }
+  },
+
+  /**
+   * Extracts linkNode and href for the current click target.
+   *
+   * @param event
+   *        The click event.
+   * @return [href, linkNode].
+   *
+   * @note linkNode will be null if the click wasn't on an anchor
+   *       element (or XLink).
+   */
+  _hrefAndLinkNodeForClickEvent: function(event) {
+    function isHTMLLink(aNode) {
+      return ((aNode instanceof content.HTMLAnchorElement && aNode.href) ||
+              (aNode instanceof content.HTMLAreaElement && aNode.href) ||
+              aNode instanceof content.HTMLLinkElement);
+    }
+
+    let node = event.target;
+    while (node && !isHTMLLink(node)) {
+      node = node.parentNode;
+    }
+
+    if (node)
+      return [node.href, node];
+
+    // If there is no linkNode, try simple XLink.
+    let href, baseURI;
+    node = event.target;
+    while (node && !href) {
+      if (node.nodeType == content.Node.ELEMENT_NODE) {
+        href = node.getAttributeNS("http://www.w3.org/1999/xlink", "href");
+        if (href)
+          baseURI = node.ownerDocument.baseURIObject;
+      }
+      node = node.parentNode;
+    }
+
+    // In case of XLink, we don't return the node we got href from since
+    // callers expect <a>-like elements.
+    // Note: makeURI() will throw if aUri is not a valid URI.
+    return [href ? Services.io.newURI(href, null, baseURI).spec : null, null];
+  }
+};
diff --git a/browser/metro/base/tests/mochitest/browser_link_click.html b/browser/metro/base/tests/mochitest/browser_link_click.html
new file mode 100644
index 000000000000..5a656385cc30
--- /dev/null
+++ b/browser/metro/base/tests/mochitest/browser_link_click.html
@@ -0,0 +1,10 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset="UTF-8">
+    <title>link click test</title>
+  </head>
+  <body>
+    <a id="link" href="about:blank">link</a>
+  </body>
+</html>
diff --git a/browser/metro/base/tests/mochitest/browser_link_click.js b/browser/metro/base/tests/mochitest/browser_link_click.js
new file mode 100644
index 000000000000..f1a71deb5120
--- /dev/null
+++ b/browser/metro/base/tests/mochitest/browser_link_click.js
@@ -0,0 +1,97 @@
+/* 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/. */
+"use strict";
+
+function test() {
+  waitForExplicitFinish();
+  runTests();
+}
+
+gTests.push({
+  desc: "regular link click",
+  run: function () {
+    let tab = yield addTab(chromeRoot + "browser_link_click.html");
+    let tabCount = Browser.tabs.length;
+
+    EventUtils.sendMouseEvent({type: "click"}, "link", tab.browser.contentWindow);
+    yield waitForCondition(() => tab.browser.currentURI.spec == "about:blank");
+    is(Browser.tabs.length, tabCount, "link loaded in the same tab");
+  }
+});
+
+gTests.push({
+  desc: "middle-click opens link in background tab",
+  run: function () {
+    let tab = yield addTab(chromeRoot + "browser_link_click.html");
+
+    let tabOpen = waitForEvent(window, "TabOpen");
+    EventUtils.sendMouseEvent({type: "click", button: 1}, "link", tab.browser.contentWindow);
+    let event = yield tabOpen;
+
+    let newTab = Browser.getTabFromChrome(event.originalTarget);
+    yield waitForEvent(newTab.browser, "pageshow");
+
+    is(newTab.browser.currentURI.spec, "about:blank");
+    ok(newTab != Browser.selectedTab, "new tab is in the background");
+
+    Browser.closeTab(newTab, { forceClose: true });
+  }
+});
+
+gTests.push({
+  desc: "shift-middle-click opens link in background tab",
+  run: function () {
+    let tab = yield addTab(chromeRoot + "browser_link_click.html");
+
+    let tabOpen = waitForEvent(window, "TabOpen");
+    EventUtils.sendMouseEvent({type: "click", button: 1, shiftKey: true}, "link", tab.browser.contentWindow);
+    let event = yield tabOpen;
+
+    let newTab = Browser.getTabFromChrome(event.originalTarget);
+    yield waitForEvent(newTab.browser, "pageshow");
+
+    is(newTab.browser.currentURI.spec, "about:blank");
+    ok(newTab == Browser.selectedTab, "new tab is in the foreground");
+
+    Browser.closeTab(newTab, { forceClose: true });
+  }
+});
+
+gTests.push({
+  desc: "ctrl-click opens link in background tab",
+  run: function () {
+    let tab = yield addTab(chromeRoot + "browser_link_click.html");
+
+    let tabOpen = waitForEvent(window, "TabOpen");
+    EventUtils.sendMouseEvent({type: "click", ctrlKey: true}, "link", tab.browser.contentWindow);
+    let event = yield tabOpen;
+
+    let newTab = Browser.getTabFromChrome(event.originalTarget);
+    yield waitForEvent(newTab.browser, "pageshow");
+
+    is(newTab.browser.currentURI.spec, "about:blank");
+    ok(newTab != Browser.selectedTab, "new tab is in the background");
+
+    Browser.closeTab(newTab, { forceClose: true });
+  }
+});
+
+gTests.push({
+  desc: "shift-ctrl-click opens link in background tab",
+  run: function () {
+    let tab = yield addTab(chromeRoot + "browser_link_click.html");
+
+    let tabOpen = waitForEvent(window, "TabOpen");
+    EventUtils.sendMouseEvent({type: "click", ctrlKey: true, shiftKey: true}, "link", tab.browser.contentWindow);
+    let event = yield tabOpen;
+
+    let newTab = Browser.getTabFromChrome(event.originalTarget);
+    yield waitForEvent(newTab.browser, "pageshow");
+
+    is(newTab.browser.currentURI.spec, "about:blank");
+    ok(newTab == Browser.selectedTab, "new tab is in the foreground");
+
+    Browser.closeTab(newTab, { forceClose: true });
+  }
+});
diff --git a/browser/metro/base/tests/mochitest/metro.ini b/browser/metro/base/tests/mochitest/metro.ini
index c31d70aefb14..307029ee5c6d 100644
--- a/browser/metro/base/tests/mochitest/metro.ini
+++ b/browser/metro/base/tests/mochitest/metro.ini
@@ -6,6 +6,7 @@ support-files =
   browser_context_menu_tests_04.html
   browser_findbar.html
   browser_form_auto_complete.html
+  browser_link_click.html
   browser_onscreen_keyboard.html
   browser_progress_indicator.xul
   browser_selection_basic.html
@@ -42,6 +43,7 @@ support-files =
 [browser_form_auto_complete.js]
 [browser_history.js]
 [browser_inputsource.js]
+[browser_link_click.js]
 [browser_onscreen_keyboard.js]
 [browser_prefs_ui.js]
 [browser_remotetabs.js]
diff --git a/mobile/android/themes/core/content.css b/mobile/android/themes/core/content.css
index 8644d6e602ca..d815ca3c4e09 100644
--- a/mobile/android/themes/core/content.css
+++ b/mobile/android/themes/core/content.css
@@ -306,5 +306,5 @@ textarea:not([disabled]):active,
 option:active,
 label:active,
 xul|menulist:active {
-  background-color: @color_background_highlight_overlay@ !important;
+  background-color: @color_background_highlight_overlay@;
 }