Backed out changeset af6ffefb5572 (bug 1831259) for causing bc failures in browser_aboutPrefs_fc_check_cantApply.js CLOSED TREE

browser/components/preferences/findInPage.js

@@ -105,13 +105,10 @@ var gSearchResultsPane = {
     if (!this.categoriesInitialized) {
       this.categoriesInitialized = true;
       // Each element of gCategoryInits is a name
-      for (let category of gCategoryInits.values()) {
-        category.init();
-      }
-      if (document.hasPendingL10nMutations) {
-        await new Promise(r =>
-          document.addEventListener("L10nMutationsFinished", r, { once: true })
-        );
+      for (let [, /* name */ category] of gCategoryInits) {
+        if (!category.inited) {
+          await category.init();
+        }
       }
     }
   },

browser/components/preferences/preferences.js

@@ -155,24 +155,43 @@ var gLastCategory = { category: undefined, subcategory: undefined };
 const gXULDOMParser = new DOMParser();
 var gCategoryModules = new Map();
 var gCategoryInits = new Map();
+function init_category_if_required(category) {
+  let categoryInfo = gCategoryInits.get(category);
+  if (!categoryInfo) {
+    throw new Error(
+      "Unknown in-content prefs category! Can't init " + category
+    );
+  }
+  if (categoryInfo.inited) {
+    return null;
+  }
+  return categoryInfo.init();
+}
 
 function register_module(categoryName, categoryObject) {
   gCategoryModules.set(categoryName, categoryObject);
   gCategoryInits.set(categoryName, {
-    _initted: false,
-    init() {
+    inited: false,
+    async init() {
       let startTime = performance.now();
-      if (this._initted) {
-        return;
-      }
-      this._initted = true;
       let template = document.getElementById("template-" + categoryName);
       if (template) {
         // Replace the template element with the nodes inside of it.
-        template.replaceWith(template.content);
+        let frag = template.content;
+        await document.l10n.translateFragment(frag);
+
+        // Actually insert them into the DOM.
+        document.l10n.pauseObserving();
+        template.replaceWith(frag);
+        document.l10n.resumeObserving();
+
+        // We need to queue an update again because the previous update might
+        // have happened while we awaited on translateFragment.
+        Preferences.queueUpdateOfAllElements();
       }
 
       categoryObject.init();
+      this.inited = true;
       ChromeUtils.addProfilerMarker(
         "Preferences",
         { startTime },
@@ -367,28 +386,24 @@ async function gotoPref(
   }
   window.history.replaceState(category, document.title);
 
-  let categoryInfo = gCategoryInits.get(category);
-  if (!categoryInfo) {
-    let err = new Error(
-      "Unknown in-content prefs category! Can't init " + category
+  try {
+    await init_category_if_required(category);
+  } catch (ex) {
+    console.error(
+      new Error(
+        "Error initializing preference category " + category + ": " + ex
+      )
     );
-    console.error(err);
-    throw err;
+    throw ex;
   }
-  categoryInfo.init();
 
-  if (document.hasPendingL10nMutations) {
-    await new Promise(r =>
-      document.addEventListener("L10nMutationsFinished", r, { once: true })
-    );
-    // Bail out of this goToPref if the category
-    // or subcategory changed during async operation.
-    if (
-      gLastCategory.category !== category ||
-      gLastCategory.subcategory !== subcategory
-    ) {
-      return;
-    }
+  // Bail out of this goToPref if the category
+  // or subcategory changed during async operation.
+  if (
+    gLastCategory.category !== category ||
+    gLastCategory.subcategory !== subcategory
+  ) {
+    return;
   }
 
   search(category, "data-category");

browser/components/preferences/tests/browser_experimental_features_filter.js

@@ -143,27 +143,17 @@ add_task(async function testFilterFeatures() {
       );
     }
 
-    // Check that switching to a non-find-in-page category changes item
-    // visibility appropriately.
     EventUtils.synthesizeMouseAtCenter(
       doc.getElementById(category),
       {},
       gBrowser.contentWindow
     );
 
-    // Ensure that async passes of localization and any code waiting for
-    // those passes have finished running.
-    await new Promise(r =>
-      requestAnimationFrame(() => requestAnimationFrame(r))
-    );
-    let shouldShow = category == "category-experimental";
     for (let definition of definitions) {
       checkVisibility(
         doc.getElementById(definition.id),
-        shouldShow,
-        `${definition.id} should be ${
-          shouldShow ? "visible" : "hidden"
-        } after category change to ${category}`
+        true,
+        `${definition.id} should be visible after category change to ${category}`
       );
     }
   }

browser/modules/test/browser/browser_UsageTelemetry_interaction.js

@@ -689,12 +689,9 @@ add_task(async function mainMenu() {
 });
 
 add_task(async function preferences() {
-  let finalPaneEvent = Services.prefs.getBoolPref("identity.fxaccounts.enabled")
-    ? "sync-pane-loaded"
-    : "privacy-pane-loaded";
-  let finalPrefPaneLoaded = TestUtils.topicObserved(finalPaneEvent, () => true);
+  let initialized = BrowserTestUtils.waitForEvent(gBrowser, "Initialized");
   await BrowserTestUtils.withNewTab("about:preferences", async browser => {
-    await finalPrefPaneLoaded;
+    await initialized;
 
     Services.telemetry.getSnapshotForKeyedScalars("main", true);