Add m-esr52 at 52.6.0

1 files changed, 2867 insertions, 0 deletions

diff --git a/browser/components/nsBrowserGlue.js b/browser/components/nsBrowserGlue.js
new file mode 100644
index 000000000..d69a11f6b
--- /dev/null
+++ b/browser/components/nsBrowserGlue.js
@@ -0,0 +1,2867 @@
+/* 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/. */
+
+const Ci = Components.interfaces;
+const Cc = Components.classes;
+const Cr = Components.results;
+const Cu = Components.utils;
+
+const XULNS = "http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul";
+
+Cu.import("resource://gre/modules/XPCOMUtils.jsm");
+Cu.import("resource://gre/modules/Services.jsm");
+Cu.import("resource://gre/modules/AppConstants.jsm");
+Cu.import("resource://gre/modules/AsyncPrefs.jsm");
+
+XPCOMUtils.defineLazyServiceGetter(this, "WindowsUIUtils", "@mozilla.org/windows-ui-utils;1", "nsIWindowsUIUtils");
+XPCOMUtils.defineLazyServiceGetter(this, "AlertsService", "@mozilla.org/alerts-service;1", "nsIAlertsService");
+
+// lazy module getters
+[
+  ["AboutHome", "resource:///modules/AboutHome.jsm"],
+  ["AboutNewTab", "resource:///modules/AboutNewTab.jsm"],
+  ["AddonManager", "resource://gre/modules/AddonManager.jsm"],
+  ["AddonWatcher", "resource://gre/modules/AddonWatcher.jsm"],
+  ["AsyncShutdown", "resource://gre/modules/AsyncShutdown.jsm"],
+  ["AutoCompletePopup", "resource://gre/modules/AutoCompletePopup.jsm"],
+  ["BookmarkHTMLUtils", "resource://gre/modules/BookmarkHTMLUtils.jsm"],
+  ["BookmarkJSONUtils", "resource://gre/modules/BookmarkJSONUtils.jsm"],
+  ["BrowserUITelemetry", "resource:///modules/BrowserUITelemetry.jsm"],
+  ["BrowserUsageTelemetry", "resource:///modules/BrowserUsageTelemetry.jsm"],
+  ["ContentClick", "resource:///modules/ContentClick.jsm"],
+  ["ContentPrefServiceParent", "resource://gre/modules/ContentPrefServiceParent.jsm"],
+  ["ContentSearch", "resource:///modules/ContentSearch.jsm"],
+  ["DateTimePickerHelper", "resource://gre/modules/DateTimePickerHelper.jsm"],
+  ["DirectoryLinksProvider", "resource:///modules/DirectoryLinksProvider.jsm"],
+  ["Feeds", "resource:///modules/Feeds.jsm"],
+  ["FileUtils", "resource://gre/modules/FileUtils.jsm"],
+  ["FormValidationHandler", "resource:///modules/FormValidationHandler.jsm"],
+  ["Integration", "resource://gre/modules/Integration.jsm"],
+  ["LightweightThemeManager", "resource://gre/modules/LightweightThemeManager.jsm"],
+  ["LoginHelper", "resource://gre/modules/LoginHelper.jsm"],
+  ["LoginManagerParent", "resource://gre/modules/LoginManagerParent.jsm"],
+  ["NetUtil", "resource://gre/modules/NetUtil.jsm"],
+  ["NewTabMessages", "resource:///modules/NewTabMessages.jsm"],
+  ["NewTabUtils", "resource://gre/modules/NewTabUtils.jsm"],
+  ["OS", "resource://gre/modules/osfile.jsm"],
+  ["PageThumbs", "resource://gre/modules/PageThumbs.jsm"],
+  ["PdfJs", "resource://pdf.js/PdfJs.jsm"],
+  ["PermissionUI", "resource:///modules/PermissionUI.jsm"],
+  ["PlacesBackups", "resource://gre/modules/PlacesBackups.jsm"],
+  ["PlacesUtils", "resource://gre/modules/PlacesUtils.jsm"],
+  ["PluralForm", "resource://gre/modules/PluralForm.jsm"],
+  ["PrivateBrowsingUtils", "resource://gre/modules/PrivateBrowsingUtils.jsm"],
+  ["ProcessHangMonitor", "resource:///modules/ProcessHangMonitor.jsm"],
+  ["ReaderParent", "resource:///modules/ReaderParent.jsm"],
+  ["RecentWindow", "resource:///modules/RecentWindow.jsm"],
+  ["RemotePrompt", "resource:///modules/RemotePrompt.jsm"],
+  ["SelfSupportBackend", "resource:///modules/SelfSupportBackend.jsm"],
+  ["SessionStore", "resource:///modules/sessionstore/SessionStore.jsm"],
+  ["ShellService", "resource:///modules/ShellService.jsm"],
+  ["SimpleServiceDiscovery", "resource://gre/modules/SimpleServiceDiscovery.jsm"],
+  ["TabCrashHandler", "resource:///modules/ContentCrashHandlers.jsm"],
+  ["Task", "resource://gre/modules/Task.jsm"],
+  ["UITour", "resource:///modules/UITour.jsm"],
+  ["URLBarZoom", "resource:///modules/URLBarZoom.jsm"],
+  ["WebChannel", "resource://gre/modules/WebChannel.jsm"],
+  ["WindowsRegistry", "resource://gre/modules/WindowsRegistry.jsm"],
+  ["webrtcUI", "resource:///modules/webrtcUI.jsm"],
+].forEach(([name, resource]) => XPCOMUtils.defineLazyModuleGetter(this, name, resource));
+
+if (AppConstants.MOZ_CRASHREPORTER) {
+  XPCOMUtils.defineLazyModuleGetter(this, "PluginCrashReporter",
+                                    "resource:///modules/ContentCrashHandlers.jsm");
+  XPCOMUtils.defineLazyModuleGetter(this, "UnsubmittedCrashHandler",
+                                    "resource:///modules/ContentCrashHandlers.jsm");
+  XPCOMUtils.defineLazyModuleGetter(this, "CrashSubmit",
+                                    "resource://gre/modules/CrashSubmit.jsm");
+}
+
+XPCOMUtils.defineLazyGetter(this, "gBrandBundle", function() {
+  return Services.strings.createBundle('chrome://branding/locale/brand.properties');
+});
+
+XPCOMUtils.defineLazyGetter(this, "gBrowserBundle", function() {
+  return Services.strings.createBundle('chrome://browser/locale/browser.properties');
+});
+
+// Seconds of idle before trying to create a bookmarks backup.
+const BOOKMARKS_BACKUP_IDLE_TIME_SEC = 8 * 60;
+// Minimum interval between backups.  We try to not create more than one backup
+// per interval.
+const BOOKMARKS_BACKUP_MIN_INTERVAL_DAYS = 1;
+// Maximum interval between backups.  If the last backup is older than these
+// days we will try to create a new one more aggressively.
+const BOOKMARKS_BACKUP_MAX_INTERVAL_DAYS = 3;
+
+// Factory object
+const BrowserGlueServiceFactory = {
+  _instance: null,
+  createInstance: function BGSF_createInstance(outer, iid) {
+    if (outer != null)
+      throw Components.results.NS_ERROR_NO_AGGREGATION;
+    return this._instance == null ?
+      this._instance = new BrowserGlue() : this._instance;
+  }
+};
+
+// Constructor
+
+function BrowserGlue() {
+  XPCOMUtils.defineLazyServiceGetter(this, "_idleService",
+                                     "@mozilla.org/widget/idleservice;1",
+                                     "nsIIdleService");
+
+  XPCOMUtils.defineLazyGetter(this, "_distributionCustomizer", function() {
+                                Cu.import("resource:///modules/distribution.js");
+                                return new DistributionCustomizer();
+                              });
+
+  XPCOMUtils.defineLazyGetter(this, "_sanitizer",
+    function() {
+      let sanitizerScope = {};
+      Services.scriptloader.loadSubScript("chrome://browser/content/sanitize.js", sanitizerScope);
+      return sanitizerScope.Sanitizer;
+    });
+
+  this._init();
+}
+
+/*
+ * OS X has the concept of zero-window sessions and therefore ignores the
+ * browser-lastwindow-close-* topics.
+ */
+const OBSERVE_LASTWINDOW_CLOSE_TOPICS = AppConstants.platform != "macosx";
+
+BrowserGlue.prototype = {
+  _saveSession: false,
+  _isPlacesInitObserver: false,
+  _isPlacesLockedObserver: false,
+  _isPlacesShutdownObserver: false,
+  _isPlacesDatabaseLocked: false,
+  _migrationImportsDefaultBookmarks: false,
+
+  _setPrefToSaveSession: function BG__setPrefToSaveSession(aForce) {
+    if (!this._saveSession && !aForce)
+      return;
+
+    Services.prefs.setBoolPref("browser.sessionstore.resume_session_once", true);
+
+    // This method can be called via [NSApplication terminate:] on Mac, which
+    // ends up causing prefs not to be flushed to disk, so we need to do that
+    // explicitly here. See bug 497652.
+    Services.prefs.savePrefFile(null);
+  },
+
+  _setSyncAutoconnectDelay: function BG__setSyncAutoconnectDelay() {
+    // Assume that a non-zero value for services.sync.autoconnectDelay should override
+    if (Services.prefs.prefHasUserValue("services.sync.autoconnectDelay")) {
+      let prefDelay = Services.prefs.getIntPref("services.sync.autoconnectDelay");
+
+      if (prefDelay > 0)
+        return;
+    }
+
+    // delays are in seconds
+    const MAX_DELAY = 300;
+    let delay = 3;
+    let browserEnum = Services.wm.getEnumerator("navigator:browser");
+    while (browserEnum.hasMoreElements()) {
+      delay += browserEnum.getNext().gBrowser.tabs.length;
+    }
+    delay = delay <= MAX_DELAY ? delay : MAX_DELAY;
+
+    Cu.import("resource://services-sync/main.js");
+    Weave.Service.scheduler.delayedAutoConnect(delay);
+  },
+
+  // nsIObserver implementation
+  observe: function BG_observe(subject, topic, data) {
+    switch (topic) {
+      case "notifications-open-settings":
+        this._openPreferences("content");
+        break;
+      case "prefservice:after-app-defaults":
+        this._onAppDefaults();
+        break;
+      case "final-ui-startup":
+        this._finalUIStartup();
+        break;
+      case "browser-delayed-startup-finished":
+        this._onFirstWindowLoaded(subject);
+        Services.obs.removeObserver(this, "browser-delayed-startup-finished");
+        break;
+      case "sessionstore-windows-restored":
+        this._onWindowsRestored();
+        break;
+      case "browser:purge-session-history":
+        // reset the console service's error buffer
+        Services.console.logStringMessage(null); // clear the console (in case it's open)
+        Services.console.reset();
+        break;
+      case "restart-in-safe-mode":
+        this._onSafeModeRestart();
+        break;
+      case "quit-application-requested":
+        this._onQuitRequest(subject, data);
+        break;
+      case "quit-application-granted":
+        this._onQuitApplicationGranted();
+        break;
+      case "browser-lastwindow-close-requested":
+        if (OBSERVE_LASTWINDOW_CLOSE_TOPICS) {
+          // The application is not actually quitting, but the last full browser
+          // window is about to be closed.
+          this._onQuitRequest(subject, "lastwindow");
+        }
+        break;
+      case "browser-lastwindow-close-granted":
+        if (OBSERVE_LASTWINDOW_CLOSE_TOPICS) {
+          this._setPrefToSaveSession();
+        }
+        break;
+      case "weave:service:ready":
+        this._setSyncAutoconnectDelay();
+        break;
+      case "fxaccounts:onverified":
+        this._showSyncStartedDoorhanger();
+        break;
+      case "fxaccounts:device_disconnected":
+        this._onDeviceDisconnected();
+        break;
+      case "weave:engine:clients:display-uris":
+        this._onDisplaySyncURIs(subject);
+        break;
+      case "session-save":
+        this._setPrefToSaveSession(true);
+        subject.QueryInterface(Ci.nsISupportsPRBool);
+        subject.data = true;
+        break;
+      case "places-init-complete":
+        if (!this._migrationImportsDefaultBookmarks)
+          this._initPlaces(false);
+
+        Services.obs.removeObserver(this, "places-init-complete");
+        this._isPlacesInitObserver = false;
+        // no longer needed, since history was initialized completely.
+        Services.obs.removeObserver(this, "places-database-locked");
+        this._isPlacesLockedObserver = false;
+        break;
+      case "places-database-locked":
+        this._isPlacesDatabaseLocked = true;
+        // Stop observing, so further attempts to load history service
+        // will not show the prompt.
+        Services.obs.removeObserver(this, "places-database-locked");
+        this._isPlacesLockedObserver = false;
+        break;
+      case "idle":
+        this._backupBookmarks();
+        break;
+      case "distribution-customization-complete":
+        Services.obs.removeObserver(this, "distribution-customization-complete");
+        // Customization has finished, we don't need the customizer anymore.
+        delete this._distributionCustomizer;
+        break;
+      case "browser-glue-test": // used by tests
+        if (data == "post-update-notification") {
+          if (Services.prefs.prefHasUserValue("app.update.postupdate"))
+            this._showUpdateNotification();
+        }
+        else if (data == "force-ui-migration") {
+          this._migrateUI();
+        }
+        else if (data == "force-distribution-customization") {
+          this._distributionCustomizer.applyPrefDefaults();
+          this._distributionCustomizer.applyCustomizations();
+          // To apply distribution bookmarks use "places-init-complete".
+        }
+        else if (data == "force-places-init") {
+          this._initPlaces(false);
+        }
+        else if (data == "smart-bookmarks-init") {
+          this.ensurePlacesDefaultQueriesInitialized().then(() => {
+            Services.obs.notifyObservers(null, "test-smart-bookmarks-done", null);
+          });
+        }
+        break;
+      case "initial-migration-will-import-default-bookmarks":
+        this._migrationImportsDefaultBookmarks = true;
+        break;
+      case "initial-migration-did-import-default-bookmarks":
+        this._initPlaces(true);
+        break;
+      case "handle-xul-text-link":
+        let linkHandled = subject.QueryInterface(Ci.nsISupportsPRBool);
+        if (!linkHandled.data) {
+          let win = RecentWindow.getMostRecentBrowserWindow();
+          if (win) {
+            data = JSON.parse(data);
+            let where = win.whereToOpenLink(data);
+            // Preserve legacy behavior of non-modifier left-clicks
+            // opening in a new selected tab.
+            if (where == "current") {
+              where = "tab";
+            }
+            win.openUILinkIn(data.href, where);
+            linkHandled.data = true;
+          }
+        }
+        break;
+      case "profile-before-change":
+         // Any component depending on Places should be finalized in
+         // _onPlacesShutdown.  Any component that doesn't need to act after
+         // the UI has gone should be finalized in _onQuitApplicationGranted.
+        this._dispose();
+        break;
+      case "keyword-search":
+        // This notification is broadcast by the docshell when it "fixes up" a
+        // URI that it's been asked to load into a keyword search.
+        let engine = null;
+        try {
+          engine = subject.QueryInterface(Ci.nsISearchEngine);
+        } catch (ex) {
+          Cu.reportError(ex);
+        }
+        let win = RecentWindow.getMostRecentBrowserWindow();
+        win.BrowserSearch.recordSearchInTelemetry(engine, "urlbar");
+        break;
+      case "browser-search-engine-modified":
+        // Ensure we cleanup the hiddenOneOffs pref when removing
+        // an engine, and that newly added engines are visible.
+        if (data == "engine-added" || data == "engine-removed") {
+          let engineName = subject.QueryInterface(Ci.nsISearchEngine).name;
+          let Preferences =
+            Cu.import("resource://gre/modules/Preferences.jsm", {}).Preferences;
+          let pref = Preferences.get("browser.search.hiddenOneOffs");
+          let hiddenList = pref ? pref.split(",") : [];
+          hiddenList = hiddenList.filter(x => x !== engineName);
+          Preferences.set("browser.search.hiddenOneOffs",
+                          hiddenList.join(","));
+        }
+        break;
+      case "flash-plugin-hang":
+        this._handleFlashHang();
+        break;
+      case "xpi-signature-changed":
+        let disabledAddons = JSON.parse(data).disabled;
+        AddonManager.getAddonsByIDs(disabledAddons, (addons) => {
+          for (let addon of addons) {
+            if (addon.type != "experiment") {
+              this._notifyUnsignedAddonsDisabled();
+              break;
+            }
+          }
+        });
+        break;
+      case "autocomplete-did-enter-text":
+        this._handleURLBarTelemetry(subject.QueryInterface(Ci.nsIAutoCompleteInput));
+        break;
+      case "test-initialize-sanitizer":
+        this._sanitizer.onStartup();
+        break;
+      case AddonWatcher.TOPIC_SLOW_ADDON_DETECTED:
+        this._notifySlowAddon(data);
+        break;
+    }
+  },
+
+  _handleURLBarTelemetry(input) {
+    if (!input ||
+        input.id != "urlbar" ||
+        input.inPrivateContext ||
+        input.popup.selectedIndex < 0) {
+      return;
+    }
+    let controller =
+      input.popup.view.QueryInterface(Ci.nsIAutoCompleteController);
+    let idx = input.popup.selectedIndex;
+    let value = controller.getValueAt(idx);
+    let action = input._parseActionUrl(value);
+    let actionType;
+    if (action) {
+      actionType =
+        action.type == "searchengine" && action.params.searchSuggestion ?
+          "searchsuggestion" :
+        action.type;
+    }
+    if (!actionType) {
+      let styles = new Set(controller.getStyleAt(idx).split(/\s+/));
+      let style = ["autofill", "tag", "bookmark"].find(s => styles.has(s));
+      actionType = style || "history";
+    }
+
+    Services.telemetry
+            .getHistogramById("FX_URLBAR_SELECTED_RESULT_INDEX")
+            .add(idx);
+
+    // Ideally this would be a keyed histogram and we'd just add(actionType),
+    // but keyed histograms aren't currently shown on the telemetry dashboard
+    // (bug 1151756).
+    //
+    // You can add values but don't change any of the existing values.
+    // Otherwise you'll break our data.
+    let buckets = {
+      autofill: 0,
+      bookmark: 1,
+      history: 2,
+      keyword: 3,
+      searchengine: 4,
+      searchsuggestion: 5,
+      switchtab: 6,
+      tag: 7,
+      visiturl: 8,
+      remotetab: 9,
+      extension: 10,
+    };
+    if (actionType in buckets) {
+      Services.telemetry
+              .getHistogramById("FX_URLBAR_SELECTED_RESULT_TYPE")
+              .add(buckets[actionType]);
+    } else {
+      Cu.reportError("Unknown FX_URLBAR_SELECTED_RESULT_TYPE type: " +
+                     actionType);
+    }
+  },
+
+  // initialization (called on application startup)
+  _init: function BG__init() {
+    let os = Services.obs;
+    os.addObserver(this, "notifications-open-settings", false);
+    os.addObserver(this, "prefservice:after-app-defaults", false);
+    os.addObserver(this, "final-ui-startup", false);
+    os.addObserver(this, "browser-delayed-startup-finished", false);
+    os.addObserver(this, "sessionstore-windows-restored", false);
+    os.addObserver(this, "browser:purge-session-history", false);
+    os.addObserver(this, "quit-application-requested", false);
+    os.addObserver(this, "quit-application-granted", false);
+    if (OBSERVE_LASTWINDOW_CLOSE_TOPICS) {
+      os.addObserver(this, "browser-lastwindow-close-requested", false);
+      os.addObserver(this, "browser-lastwindow-close-granted", false);
+    }
+    os.addObserver(this, "weave:service:ready", false);
+    os.addObserver(this, "fxaccounts:onverified", false);
+    os.addObserver(this, "fxaccounts:device_disconnected", false);
+    os.addObserver(this, "weave:engine:clients:display-uris", false);
+    os.addObserver(this, "session-save", false);
+    os.addObserver(this, "places-init-complete", false);
+    this._isPlacesInitObserver = true;
+    os.addObserver(this, "places-database-locked", false);
+    this._isPlacesLockedObserver = true;
+    os.addObserver(this, "distribution-customization-complete", false);
+    os.addObserver(this, "handle-xul-text-link", false);
+    os.addObserver(this, "profile-before-change", false);
+    if (AppConstants.MOZ_TELEMETRY_REPORTING) {
+      os.addObserver(this, "keyword-search", false);
+    }
+    os.addObserver(this, "browser-search-engine-modified", false);
+    os.addObserver(this, "restart-in-safe-mode", false);
+    os.addObserver(this, "flash-plugin-hang", false);
+    os.addObserver(this, "xpi-signature-changed", false);
+    os.addObserver(this, "autocomplete-did-enter-text", false);
+
+    if (AppConstants.NIGHTLY_BUILD) {
+      os.addObserver(this, AddonWatcher.TOPIC_SLOW_ADDON_DETECTED, false);
+    }
+
+    this._flashHangCount = 0;
+    this._firstWindowReady = new Promise(resolve => this._firstWindowLoaded = resolve);
+
+    if (AppConstants.platform == "win" ||
+        AppConstants.platform == "macosx") {
+      // Handles prompting to inform about incompatibilites when accessibility
+      // and e10s are active together.
+      E10SAccessibilityCheck.init();
+    }
+  },
+
+  // cleanup (called on application shutdown)
+  _dispose: function BG__dispose() {
+    let os = Services.obs;
+    os.removeObserver(this, "notifications-open-settings");
+    os.removeObserver(this, "prefservice:after-app-defaults");
+    os.removeObserver(this, "final-ui-startup");
+    os.removeObserver(this, "sessionstore-windows-restored");
+    os.removeObserver(this, "browser:purge-session-history");
+    os.removeObserver(this, "quit-application-requested");
+    os.removeObserver(this, "quit-application-granted");
+    os.removeObserver(this, "restart-in-safe-mode");
+    if (OBSERVE_LASTWINDOW_CLOSE_TOPICS) {
+      os.removeObserver(this, "browser-lastwindow-close-requested");
+      os.removeObserver(this, "browser-lastwindow-close-granted");
+    }
+    os.removeObserver(this, "weave:service:ready");
+    os.removeObserver(this, "fxaccounts:onverified");
+    os.removeObserver(this, "fxaccounts:device_disconnected");
+    os.removeObserver(this, "weave:engine:clients:display-uris");
+    os.removeObserver(this, "session-save");
+    if (this._bookmarksBackupIdleTime) {
+      this._idleService.removeIdleObserver(this, this._bookmarksBackupIdleTime);
+      delete this._bookmarksBackupIdleTime;
+    }
+    if (this._isPlacesInitObserver)
+      os.removeObserver(this, "places-init-complete");
+    if (this._isPlacesLockedObserver)
+      os.removeObserver(this, "places-database-locked");
+    os.removeObserver(this, "handle-xul-text-link");
+    os.removeObserver(this, "profile-before-change");
+    if (AppConstants.MOZ_TELEMETRY_REPORTING) {
+      os.removeObserver(this, "keyword-search");
+    }
+    os.removeObserver(this, "browser-search-engine-modified");
+    os.removeObserver(this, "flash-plugin-hang");
+    os.removeObserver(this, "xpi-signature-changed");
+    os.removeObserver(this, "autocomplete-did-enter-text");
+  },
+
+  _onAppDefaults: function BG__onAppDefaults() {
+    // apply distribution customizations (prefs)
+    // other customizations are applied in _finalUIStartup()
+    this._distributionCustomizer.applyPrefDefaults();
+  },
+
+  _notifySlowAddon: function BG_notifySlowAddon(addonId) {
+    let addonCallback = function(addon) {
+      if (!addon) {
+        Cu.reportError("couldn't look up addon: " + addonId);
+        return;
+      }
+      let win = RecentWindow.getMostRecentBrowserWindow();
+
+      if (!win) {
+        return;
+      }
+
+      let brandBundle = win.document.getElementById("bundle_brand");
+      let brandShortName = brandBundle.getString("brandShortName");
+      let message = win.gNavigatorBundle.getFormattedString("addonwatch.slow", [addon.name, brandShortName]);
+      let notificationBox = win.document.getElementById("global-notificationbox");
+      let notificationId = 'addon-slow:' + addonId;
+      let notification = notificationBox.getNotificationWithValue(notificationId);
+
+      // Monitor the response of users
+      const STATE_WARNING_DISPLAYED = 0;
+      const STATE_USER_PICKED_DISABLE = 1;
+      const STATE_USER_PICKED_IGNORE_FOR_NOW = 2;
+      const STATE_USER_PICKED_IGNORE_FOREVER = 3;
+      const STATE_USER_CLOSED_NOTIFICATION = 4;
+
+      let update = function(response) {
+        Services.telemetry.getHistogramById("SLOW_ADDON_WARNING_STATES").add(response);
+      }
+
+      let complete = false;
+      let start = Date.now();
+      let done = function(response) {
+        // Only report the first reason for closing.
+        if (complete) {
+          return;
+        }
+        complete = true;
+        update(response);
+        Services.telemetry.getHistogramById("SLOW_ADDON_WARNING_RESPONSE_TIME").add(Date.now() - start);
+      };
+
+      update(STATE_WARNING_DISPLAYED);
+
+      if (notification) {
+        notification.label = message;
+      } else {
+        let buttons = [
+          {
+            label: win.gNavigatorBundle.getFormattedString("addonwatch.disable.label", [addon.name]),
+            accessKey: "", // workaround for bug 1192901
+            callback: function() {
+              done(STATE_USER_PICKED_DISABLE);
+              addon.userDisabled = true;
+              if (addon.pendingOperations == addon.PENDING_NONE) {
+                return;
+              }
+              let restartMessage = win.gNavigatorBundle.getFormattedString("addonwatch.restart.message", [addon.name, brandShortName]);
+              let restartButton = [
+                {
+                  label: win.gNavigatorBundle.getFormattedString("addonwatch.restart.label", [brandShortName]),
+                  accessKey: win.gNavigatorBundle.getString("addonwatch.restart.accesskey"),
+                  callback: function() {
+                    let appStartup = Cc["@mozilla.org/toolkit/app-startup;1"]
+                      .getService(Ci.nsIAppStartup);
+                    appStartup.quit(appStartup.eForceQuit | appStartup.eRestart);
+                  }
+                }
+              ];
+              const priority = notificationBox.PRIORITY_WARNING_MEDIUM;
+              notificationBox.appendNotification(restartMessage, "restart-" + addonId, "",
+                                                 priority, restartButton);
+            }
+          },
+          {
+            label: win.gNavigatorBundle.getString("addonwatch.ignoreSession.label"),
+            accessKey: win.gNavigatorBundle.getString("addonwatch.ignoreSession.accesskey"),
+            callback: function() {
+              done(STATE_USER_PICKED_IGNORE_FOR_NOW);
+              AddonWatcher.ignoreAddonForSession(addonId);
+            }
+          },
+          {
+            label: win.gNavigatorBundle.getString("addonwatch.ignorePerm.label"),
+            accessKey: win.gNavigatorBundle.getString("addonwatch.ignorePerm.accesskey"),
+            callback: function() {
+              done(STATE_USER_PICKED_IGNORE_FOREVER);
+              AddonWatcher.ignoreAddonPermanently(addonId);
+            }
+          },
+        ];
+
+        const priority = notificationBox.PRIORITY_WARNING_MEDIUM;
+        notification = notificationBox.appendNotification(
+          message, notificationId, "",
+          priority, buttons,
+          function(topic) {
+            if (topic == "removed") {
+              // Other callbacks are called before this one and only the first
+              // call to `done` is taken into account, so if this call to `done`
+              // gets through, this means that the user has closed the notification
+              // manually.
+              done(STATE_USER_CLOSED_NOTIFICATION);
+            }
+          });
+      }
+    };
+    AddonManager.getAddonByID(addonId, addonCallback);
+  },
+
+  // runs on startup, before the first command line handler is invoked
+  // (i.e. before the first window is opened)
+  _finalUIStartup: function BG__finalUIStartup() {
+    this._sanitizer.onStartup();
+    // check if we're in safe mode
+    if (Services.appinfo.inSafeMode) {
+      Services.ww.openWindow(null, "chrome://browser/content/safeMode.xul",
+                             "_blank", "chrome,centerscreen,modal,resizable=no", null);
+    }
+
+    // apply distribution customizations
+    // prefs are applied in _onAppDefaults()
+    this._distributionCustomizer.applyCustomizations();
+
+    // handle any UI migration
+    this._migrateUI();
+
+    // This is support code for the location bar search suggestions; passing
+    // from opt-in to opt-out should respect the user's choice, thus we need
+    // to cache that choice in a pref for future use.
+    // Note: this is not in migrateUI because we need to uplift it. This
+    // code is also short-lived, since we can remove it as soon as opt-out
+    // search suggestions shipped in release (Bug 1344928).
+    try {
+      let urlbarPrefs = Services.prefs.getBranch("browser.urlbar.");
+      if (!urlbarPrefs.prefHasUserValue("searchSuggestionsChoice") &&
+          urlbarPrefs.getBoolPref("userMadeSearchSuggestionsChoice")) {
+        urlbarPrefs.setBoolPref("searchSuggestionsChoice",
+                                urlbarPrefs.getBoolPref("suggest.searches"));
+      }
+    } catch (ex) { /* missing any of the prefs is not critical */ }
+
+    PageThumbs.init();
+    webrtcUI.init();
+    AboutHome.init();
+
+    DirectoryLinksProvider.init();
+    NewTabUtils.init();
+    NewTabUtils.links.addProvider(DirectoryLinksProvider);
+    AboutNewTab.init();
+
+    NewTabMessages.init();
+
+    SessionStore.init();
+    BrowserUsageTelemetry.init();
+    BrowserUITelemetry.init();
+    ContentSearch.init();
+    FormValidationHandler.init();
+
+    ContentClick.init();
+    RemotePrompt.init();
+    Feeds.init();
+    ContentPrefServiceParent.init();
+
+    LoginManagerParent.init();
+    ReaderParent.init();
+    URLBarZoom.init();
+
+    SelfSupportBackend.init();
+
+    // Ensure we keep track of places/pw-mananager undo by init'ing this early.
+    Cu.import("resource:///modules/AutoMigrate.jsm");
+
+    if (!AppConstants.RELEASE_OR_BETA) {
+      let themeName = gBrowserBundle.GetStringFromName("deveditionTheme.name");
+      let vendorShortName = gBrandBundle.GetStringFromName("vendorShortName");
+
+      LightweightThemeManager.addBuiltInTheme({
+        id: "firefox-devedition@mozilla.org",
+        name: themeName,
+        headerURL: "resource:///chrome/browser/content/browser/defaultthemes/devedition.header.png",
+        iconURL: "resource:///chrome/browser/content/browser/defaultthemes/devedition.icon.png",
+        author: vendorShortName,
+      });
+    }
+
+    TabCrashHandler.init();
+    if (AppConstants.MOZ_CRASHREPORTER) {
+      PluginCrashReporter.init();
+      UnsubmittedCrashHandler.init();
+    }
+
+    Services.obs.notifyObservers(null, "browser-ui-startup-complete", "");
+  },
+
+  _checkForOldBuildUpdates: function () {
+    // check for update if our build is old
+    if (AppConstants.MOZ_UPDATER &&
+        Services.prefs.getBoolPref("app.update.enabled") &&
+        Services.prefs.getBoolPref("app.update.checkInstallTime")) {
+
+      let buildID = Services.appinfo.appBuildID;
+      let today = new Date().getTime();
+      let buildDate = new Date(buildID.slice(0, 4),     // year
+                               buildID.slice(4, 6) - 1, // months are zero-based.
+                               buildID.slice(6, 8),     // day
+                               buildID.slice(8, 10),    // hour
+                               buildID.slice(10, 12),   // min
+                               buildID.slice(12, 14))   // ms
+      .getTime();
+
+      const millisecondsIn24Hours = 86400000;
+      let acceptableAge = Services.prefs.getIntPref("app.update.checkInstallTime.days") * millisecondsIn24Hours;
+
+      if (buildDate + acceptableAge < today) {
+        Cc["@mozilla.org/updates/update-service;1"].getService(Ci.nsIApplicationUpdateService).checkForBackgroundUpdates();
+      }
+    }
+  },
+
+  _onSafeModeRestart: function BG_onSafeModeRestart() {
+    // prompt the user to confirm
+    let strings = gBrowserBundle;
+    let promptTitle = strings.GetStringFromName("safeModeRestartPromptTitle");
+    let promptMessage = strings.GetStringFromName("safeModeRestartPromptMessage");
+    let restartText = strings.GetStringFromName("safeModeRestartButton");
+    let buttonFlags = (Services.prompt.BUTTON_POS_0 *
+                       Services.prompt.BUTTON_TITLE_IS_STRING) +
+                      (Services.prompt.BUTTON_POS_1 *
+                       Services.prompt.BUTTON_TITLE_CANCEL) +
+                      Services.prompt.BUTTON_POS_0_DEFAULT;
+
+    let rv = Services.prompt.confirmEx(null, promptTitle, promptMessage,
+                                       buttonFlags, restartText, null, null,
+                                       null, {});
+    if (rv != 0)
+      return;
+
+    let cancelQuit = Cc["@mozilla.org/supports-PRBool;1"]
+                       .createInstance(Ci.nsISupportsPRBool);
+    Services.obs.notifyObservers(cancelQuit, "quit-application-requested", "restart");
+
+    if (!cancelQuit.data) {
+      Services.startup.restartInSafeMode(Ci.nsIAppStartup.eAttemptQuit);
+    }
+  },
+
+  _trackSlowStartup: function () {
+    if (Services.startup.interrupted ||
+        Services.prefs.getBoolPref("browser.slowStartup.notificationDisabled"))
+      return;
+
+    let currentTime = Date.now() - Services.startup.getStartupInfo().process;
+    let averageTime = 0;
+    let samples = 0;
+    try {
+      averageTime = Services.prefs.getIntPref("browser.slowStartup.averageTime");
+      samples = Services.prefs.getIntPref("browser.slowStartup.samples");
+    } catch (e) { }
+
+    let totalTime = (averageTime * samples) + currentTime;
+    samples++;
+    averageTime = totalTime / samples;
+
+    if (samples >= Services.prefs.getIntPref("browser.slowStartup.maxSamples")) {
+      if (averageTime > Services.prefs.getIntPref("browser.slowStartup.timeThreshold"))
+        this._calculateProfileAgeInDays().then(this._showSlowStartupNotification, null);
+      averageTime = 0;
+      samples = 0;
+    }
+
+    Services.prefs.setIntPref("browser.slowStartup.averageTime", averageTime);
+    Services.prefs.setIntPref("browser.slowStartup.samples", samples);
+  },
+
+  _calculateProfileAgeInDays: Task.async(function* () {
+    let ProfileAge = Cu.import("resource://gre/modules/ProfileAge.jsm", {}).ProfileAge;
+    let profileAge = new ProfileAge(null, null);
+
+    let creationDate = yield profileAge.created;
+    let resetDate = yield profileAge.reset;
+
+    // if the profile was reset, consider the
+    // reset date for its age.
+    let profileDate = resetDate || creationDate;
+
+    const ONE_DAY = 24 * 60 * 60 * 1000;
+    return (Date.now() - profileDate) / ONE_DAY;
+  }),
+
+  _showSlowStartupNotification: function (profileAge) {
+    if (profileAge < 90) // 3 months
+      return;
+
+    let win = RecentWindow.getMostRecentBrowserWindow();
+    if (!win)
+      return;
+
+    let productName = gBrandBundle.GetStringFromName("brandFullName");
+    let message = win.gNavigatorBundle.getFormattedString("slowStartup.message", [productName]);
+
+    let buttons = [
+      {
+        label:     win.gNavigatorBundle.getString("slowStartup.helpButton.label"),
+        accessKey: win.gNavigatorBundle.getString("slowStartup.helpButton.accesskey"),
+        callback: function () {
+          win.openUILinkIn("https://support.mozilla.org/kb/reset-firefox-easily-fix-most-problems", "tab");
+        }
+      },
+      {
+        label:     win.gNavigatorBundle.getString("slowStartup.disableNotificationButton.label"),
+        accessKey: win.gNavigatorBundle.getString("slowStartup.disableNotificationButton.accesskey"),
+        callback: function () {
+          Services.prefs.setBoolPref("browser.slowStartup.notificationDisabled", true);
+        }
+      }
+    ];
+
+    let nb = win.document.getElementById("global-notificationbox");
+    nb.appendNotification(message, "slow-startup",
+                          "chrome://browser/skin/slowStartup-16.png",
+                          nb.PRIORITY_INFO_LOW, buttons);
+  },
+
+  /**
+   * Show a notification bar offering a reset.
+   *
+   * @param reason
+   *        String of either "unused" or "uninstall", specifying the reason
+   *        why a profile reset is offered.
+   */
+  _resetProfileNotification: function (reason) {
+    let win = RecentWindow.getMostRecentBrowserWindow();
+    if (!win)
+      return;
+
+    Cu.import("resource://gre/modules/ResetProfile.jsm");
+    if (!ResetProfile.resetSupported())
+      return;
+
+    let productName = gBrandBundle.GetStringFromName("brandShortName");
+    let resetBundle = Services.strings
+                              .createBundle("chrome://global/locale/resetProfile.properties");
+
+    let message;
+    if (reason == "unused") {
+      message = resetBundle.formatStringFromName("resetUnusedProfile.message", [productName], 1);
+    } else if (reason == "uninstall") {
+      message = resetBundle.formatStringFromName("resetUninstalled.message", [productName], 1);
+    } else {
+      throw new Error(`Unknown reason (${reason}) given to _resetProfileNotification.`);
+    }
+    let buttons = [
+      {
+        label:     resetBundle.formatStringFromName("refreshProfile.resetButton.label", [productName], 1),
+        accessKey: resetBundle.GetStringFromName("refreshProfile.resetButton.accesskey"),
+        callback: function () {
+          ResetProfile.openConfirmationDialog(win);
+        }
+      },
+    ];
+
+    let nb = win.document.getElementById("global-notificationbox");
+    nb.appendNotification(message, "reset-profile-notification",
+                          "chrome://global/skin/icons/question-16.png",
+                          nb.PRIORITY_INFO_LOW, buttons);
+  },
+
+  _notifyUnsignedAddonsDisabled: function () {
+    let win = RecentWindow.getMostRecentBrowserWindow();
+    if (!win)
+      return;
+
+    let message = win.gNavigatorBundle.getString("unsignedAddonsDisabled.message");
+    let buttons = [
+      {
+        label:     win.gNavigatorBundle.getString("unsignedAddonsDisabled.learnMore.label"),
+        accessKey: win.gNavigatorBundle.getString("unsignedAddonsDisabled.learnMore.accesskey"),
+        callback: function () {
+          win.BrowserOpenAddonsMgr("addons://list/extension?unsigned=true");
+        }
+      },
+    ];
+
+    let nb = win.document.getElementById("high-priority-global-notificationbox");
+    nb.appendNotification(message, "unsigned-addons-disabled", "",
+                          nb.PRIORITY_WARNING_MEDIUM, buttons);
+  },
+
+  _firstWindowTelemetry: function(aWindow) {
+    let SCALING_PROBE_NAME = "";
+    switch (AppConstants.platform) {
+      case "win":
+        SCALING_PROBE_NAME = "DISPLAY_SCALING_MSWIN";
+        break;
+      case "macosx":
+        SCALING_PROBE_NAME = "DISPLAY_SCALING_OSX";
+        break;
+      case "linux":
+        SCALING_PROBE_NAME = "DISPLAY_SCALING_LINUX";
+        break;
+    }
+    if (SCALING_PROBE_NAME) {
+      let scaling = aWindow.devicePixelRatio * 100;
+      try {
+        Services.telemetry.getHistogramById(SCALING_PROBE_NAME).add(scaling);
+      } catch (ex) {}
+    }
+  },
+
+  // the first browser window has finished initializing
+  _onFirstWindowLoaded: function BG__onFirstWindowLoaded(aWindow) {
+    // Initialize PdfJs when running in-process and remote. This only
+    // happens once since PdfJs registers global hooks. If the PdfJs
+    // extension is installed the init method below will be overridden
+    // leaving initialization to the extension.
+    // parent only: configure default prefs, set up pref observers, register
+    // pdf content handler, and initializes parent side message manager
+    // shim for privileged api access.
+    PdfJs.init(true);
+    // child only: similar to the call above for parent - register content
+    // handler and init message manager child shim for privileged api access.
+    // With older versions of the extension installed, this load will fail
+    // passively.
+    Services.ppmm.loadProcessScript("resource://pdf.js/pdfjschildbootstrap.js", true);
+
+    if (AppConstants.platform == "win") {
+      // For Windows 7, initialize the jump list module.
+      const WINTASKBAR_CONTRACTID = "@mozilla.org/windows-taskbar;1";
+      if (WINTASKBAR_CONTRACTID in Cc &&
+          Cc[WINTASKBAR_CONTRACTID].getService(Ci.nsIWinTaskbar).available) {
+        let temp = {};
+        Cu.import("resource:///modules/WindowsJumpLists.jsm", temp);
+        temp.WinTaskbarJumpList.startup();
+      }
+    }
+
+    ProcessHangMonitor.init();
+
+    // A channel for "remote troubleshooting" code...
+    let channel = new WebChannel("remote-troubleshooting", "remote-troubleshooting");
+    channel.listen((id, data, target) => {
+      if (data.command == "request") {
+        let {Troubleshoot} = Cu.import("resource://gre/modules/Troubleshoot.jsm", {});
+        Troubleshoot.snapshot(data => {
+          // for privacy we remove crash IDs and all preferences (but bug 1091944
+          // exists to expose prefs once we are confident of privacy implications)
+          delete data.crashes;
+          delete data.modifiedPreferences;
+          channel.send(data, target);
+        });
+      }
+    });
+
+    this._trackSlowStartup();
+
+    // Offer to reset a user's profile if it hasn't been used for 60 days.
+    const OFFER_PROFILE_RESET_INTERVAL_MS = 60 * 24 * 60 * 60 * 1000;
+    let lastUse = Services.appinfo.replacedLockTime;
+    let disableResetPrompt = false;
+    try {
+      disableResetPrompt = Services.prefs.getBoolPref("browser.disableResetPrompt");
+    } catch (e) {}
+
+    if (!disableResetPrompt && lastUse &&
+        Date.now() - lastUse >= OFFER_PROFILE_RESET_INTERVAL_MS) {
+      this._resetProfileNotification("unused");
+    } else if (AppConstants.platform == "win" && !disableResetPrompt) {
+      // Check if we were just re-installed and offer Firefox Reset
+      let updateChannel;
+      try {
+        updateChannel = Cu.import("resource://gre/modules/UpdateUtils.jsm", {}).UpdateUtils.UpdateChannel;
+      } catch (ex) {}
+      if (updateChannel) {
+        let uninstalledValue =
+          WindowsRegistry.readRegKey(Ci.nsIWindowsRegKey.ROOT_KEY_CURRENT_USER,
+                                     "Software\\Mozilla\\Firefox",
+                                     `Uninstalled-${updateChannel}`);
+        let removalSuccessful =
+          WindowsRegistry.removeRegKey(Ci.nsIWindowsRegKey.ROOT_KEY_CURRENT_USER,
+                                       "Software\\Mozilla\\Firefox",
+                                       `Uninstalled-${updateChannel}`);
+        if (removalSuccessful && uninstalledValue == "True") {
+          this._resetProfileNotification("uninstall");
+        }
+      }
+    }
+
+    this._checkForOldBuildUpdates();
+
+    AutoCompletePopup.init();
+    DateTimePickerHelper.init();
+
+    this._firstWindowTelemetry(aWindow);
+    this._firstWindowLoaded();
+  },
+
+  /**
+   * Application shutdown handler.
+   */
+  _onQuitApplicationGranted: function () {
+    // This pref must be set here because SessionStore will use its value
+    // on quit-application.
+    this._setPrefToSaveSession();
+
+    // Call trackStartupCrashEnd here in case the delayed call on startup hasn't
+    // yet occurred (see trackStartupCrashEnd caller in browser.js).
+    try {
+      let appStartup = Cc["@mozilla.org/toolkit/app-startup;1"]
+                         .getService(Ci.nsIAppStartup);
+      appStartup.trackStartupCrashEnd();
+    } catch (e) {
+      Cu.reportError("Could not end startup crash tracking in quit-application-granted: " + e);
+    }
+
+    if (this._bookmarksBackupIdleTime) {
+      this._idleService.removeIdleObserver(this, this._bookmarksBackupIdleTime);
+      delete this._bookmarksBackupIdleTime;
+    }
+
+    BrowserUsageTelemetry.uninit();
+    SelfSupportBackend.uninit();
+    PageThumbs.uninit();
+    NewTabMessages.uninit();
+    AboutNewTab.uninit();
+    webrtcUI.uninit();
+    FormValidationHandler.uninit();
+    AutoCompletePopup.uninit();
+    DateTimePickerHelper.uninit();
+    if (AppConstants.NIGHTLY_BUILD) {
+      AddonWatcher.uninit();
+    }
+  },
+
+  _initServiceDiscovery: function () {
+    if (!Services.prefs.getBoolPref("browser.casting.enabled")) {
+      return;
+    }
+    var rokuDevice = {
+      id: "roku:ecp",
+      target: "roku:ecp",
+      factory: function(aService) {
+        Cu.import("resource://gre/modules/RokuApp.jsm");
+        return new RokuApp(aService);
+      },
+      types: ["video/mp4"],
+      extensions: ["mp4"]
+    };
+
+    // Register targets
+    SimpleServiceDiscovery.registerDevice(rokuDevice);
+
+    // Search for devices continuously every 120 seconds
+    SimpleServiceDiscovery.search(120 * 1000);
+  },
+
+  // All initial windows have opened.
+  _onWindowsRestored: function BG__onWindowsRestored() {
+    if (AppConstants.MOZ_DEV_EDITION) {
+      this._createExtraDefaultProfile();
+    }
+
+    this._initServiceDiscovery();
+
+    // Show update notification, if needed.
+    if (Services.prefs.prefHasUserValue("app.update.postupdate"))
+      this._showUpdateNotification();
+
+    // Load the "more info" page for a locked places.sqlite
+    // This property is set earlier by places-database-locked topic.
+    if (this._isPlacesDatabaseLocked) {
+      this._showPlacesLockedNotificationBox();
+    }
+
+    // For any add-ons that were installed disabled and can be enabled offer
+    // them to the user.
+    let win = RecentWindow.getMostRecentBrowserWindow();
+    AddonManager.getAllAddons(addons => {
+      for (let addon of addons) {
+        // If this add-on has already seen (or seen is undefined for non-XPI
+        // add-ons) then skip it.
+        if (addon.seen !== false) {
+          continue;
+        }
+
+        // If this add-on cannot be enabled (either already enabled or
+        // appDisabled) then skip it.
+        if (!(addon.permissions & AddonManager.PERM_CAN_ENABLE)) {
+          continue;
+        }
+
+        win.openUILinkIn("about:newaddon?id=" + addon.id, "tab");
+      }
+    });
+
+    let signingRequired;
+    if (AppConstants.MOZ_REQUIRE_SIGNING) {
+      signingRequired = true;
+    } else {
+      signingRequired = Services.prefs.getBoolPref("xpinstall.signatures.required");
+    }
+
+    if (signingRequired) {
+      let disabledAddons = AddonManager.getStartupChanges(AddonManager.STARTUP_CHANGE_DISABLED);
+      AddonManager.getAddonsByIDs(disabledAddons, (addons) => {
+        for (let addon of addons) {
+          if (addon.type == "experiment")
+            continue;
+
+          if (addon.signedState <= AddonManager.SIGNEDSTATE_MISSING) {
+            this._notifyUnsignedAddonsDisabled();
+            break;
+          }
+        }
+      });
+    }
+
+    // Perform default browser checking.
+    if (ShellService) {
+      let shouldCheck = AppConstants.DEBUG ? false :
+                                             ShellService.shouldCheckDefaultBrowser;
+
+      const skipDefaultBrowserCheck =
+        Services.prefs.getBoolPref("browser.shell.skipDefaultBrowserCheckOnFirstRun") &&
+        Services.prefs.getBoolPref("browser.shell.skipDefaultBrowserCheck");
+
+      const usePromptLimit = !AppConstants.RELEASE_OR_BETA;
+      let promptCount =
+        usePromptLimit ? Services.prefs.getIntPref("browser.shell.defaultBrowserCheckCount") : 0;
+
+      let willRecoverSession = false;
+      try {
+        let ss = Cc["@mozilla.org/browser/sessionstartup;1"].
+                 getService(Ci.nsISessionStartup);
+        willRecoverSession =
+          (ss.sessionType == Ci.nsISessionStartup.RECOVER_SESSION);
+      }
+      catch (ex) { /* never mind; suppose SessionStore is broken */ }
+
+      // startup check, check all assoc
+      let isDefault = false;
+      let isDefaultError = false;
+      try {
+        isDefault = ShellService.isDefaultBrowser(true, false);
+      } catch (ex) {
+        isDefaultError = true;
+      }
+
+      if (isDefault) {
+        let now = (Math.floor(Date.now() / 1000)).toString();
+        Services.prefs.setCharPref("browser.shell.mostRecentDateSetAsDefault", now);
+      }
+
+      let willPrompt = shouldCheck && !isDefault && !willRecoverSession;
+
+      // Skip the "Set Default Browser" check during first-run or after the
+      // browser has been run a few times.
+      if (willPrompt) {
+        if (skipDefaultBrowserCheck) {
+          Services.prefs.setBoolPref("browser.shell.skipDefaultBrowserCheck", false);
+          willPrompt = false;
+        } else {
+          promptCount++;
+        }
+        if (usePromptLimit && promptCount > 3) {
+          willPrompt = false;
+        }
+      }
+
+      if (usePromptLimit && willPrompt) {
+        Services.prefs.setIntPref("browser.shell.defaultBrowserCheckCount", promptCount);
+      }
+
+      try {
+        // Report default browser status on startup to telemetry
+        // so we can track whether we are the default.
+        Services.telemetry.getHistogramById("BROWSER_IS_USER_DEFAULT")
+                          .add(isDefault);
+        Services.telemetry.getHistogramById("BROWSER_IS_USER_DEFAULT_ERROR")
+                          .add(isDefaultError);
+        Services.telemetry.getHistogramById("BROWSER_SET_DEFAULT_ALWAYS_CHECK")
+                          .add(shouldCheck);
+        Services.telemetry.getHistogramById("BROWSER_SET_DEFAULT_DIALOG_PROMPT_RAWCOUNT")
+                          .add(promptCount);
+      }
+      catch (ex) { /* Don't break the default prompt if telemetry is broken. */ }
+
+      if (willPrompt) {
+        Services.tm.mainThread.dispatch(function() {
+          DefaultBrowserCheck.prompt(RecentWindow.getMostRecentBrowserWindow());
+        }.bind(this), Ci.nsIThread.DISPATCH_NORMAL);
+      }
+    }
+
+    E10SAccessibilityCheck.onWindowsRestored();
+  },
+
+  _createExtraDefaultProfile: function () {
+    if (!AppConstants.MOZ_DEV_EDITION) {
+      return;
+    }
+    // If Developer Edition is the only installed Firefox version and no other
+    // profiles are present, create a second one for use by other versions.
+    // This helps Firefox versions earlier than 35 avoid accidentally using the
+    // unsuitable Developer Edition profile.
+    let profileService = Cc["@mozilla.org/toolkit/profile-service;1"]
+                         .getService(Ci.nsIToolkitProfileService);
+    let profileCount = profileService.profileCount;
+    if (profileCount == 1 && profileService.selectedProfile.name != "default") {
+      let newProfile;
+      try {
+        newProfile = profileService.createProfile(null, "default");
+        profileService.defaultProfile = newProfile;
+        profileService.flush();
+      } catch (e) {
+        Cu.reportError("Could not create profile 'default': " + e);
+      }
+      if (newProfile) {
+        // We don't want a default profile with Developer Edition settings, an
+        // empty profile directory will do. The profile service of the other
+        // Firefox will populate it with its own stuff.
+        let newProfilePath = newProfile.rootDir.path;
+        OS.File.removeDir(newProfilePath).then(() => {
+          return OS.File.makeDir(newProfilePath);
+        }).then(null, e => {
+          Cu.reportError("Could not empty profile 'default': " + e);
+        });
+      }
+    }
+  },
+
+  _onQuitRequest: function BG__onQuitRequest(aCancelQuit, aQuitType) {
+    // If user has already dismissed quit request, then do nothing
+    if ((aCancelQuit instanceof Ci.nsISupportsPRBool) && aCancelQuit.data)
+      return;
+
+    // There are several cases where we won't show a dialog here:
+    // 1. There is only 1 tab open in 1 window
+    // 2. The session will be restored at startup, indicated by
+    //    browser.startup.page == 3 or browser.sessionstore.resume_session_once == true
+    // 3. browser.warnOnQuit == false
+    // 4. The browser is currently in Private Browsing mode
+    // 5. The browser will be restarted.
+    //
+    // Otherwise these are the conditions and the associated dialogs that will be shown:
+    // 1. aQuitType == "lastwindow" or "quit" and browser.showQuitWarning == true
+    //    - The quit dialog will be shown
+    // 2. aQuitType == "lastwindow" && browser.tabs.warnOnClose == true
+    //    - The "closing multiple tabs" dialog will be shown
+    //
+    // aQuitType == "lastwindow" is overloaded. "lastwindow" is used to indicate
+    // "the last window is closing but we're not quitting (a non-browser window is open)"
+    // and also "we're quitting by closing the last window".
+
+    if (aQuitType == "restart")
+      return;
+
+    var windowcount = 0;
+    var pagecount = 0;
+    var browserEnum = Services.wm.getEnumerator("navigator:browser");
+    let allWindowsPrivate = true;
+    while (browserEnum.hasMoreElements()) {
+      // XXXbz should we skip closed windows here?
+      windowcount++;
+
+      var browser = browserEnum.getNext();
+      if (!PrivateBrowsingUtils.isWindowPrivate(browser))
+        allWindowsPrivate = false;
+      var tabbrowser = browser.document.getElementById("content");
+      if (tabbrowser)
+        pagecount += tabbrowser.browsers.length - tabbrowser._numPinnedTabs;
+    }
+
+    this._saveSession = false;
+    if (pagecount < 2)
+      return;
+
+    if (!aQuitType)
+      aQuitType = "quit";
+
+    // browser.warnOnQuit is a hidden global boolean to override all quit prompts
+    // browser.showQuitWarning specifically covers quitting
+    // browser.tabs.warnOnClose is the global "warn when closing multiple tabs" pref
+
+    var sessionWillBeRestored = Services.prefs.getIntPref("browser.startup.page") == 3 ||
+                                Services.prefs.getBoolPref("browser.sessionstore.resume_session_once");
+    if (sessionWillBeRestored || !Services.prefs.getBoolPref("browser.warnOnQuit"))
+      return;
+
+    let win = Services.wm.getMostRecentWindow("navigator:browser");
+
+    // On last window close or quit && showQuitWarning, we want to show the
+    // quit warning.
+    if (!Services.prefs.getBoolPref("browser.showQuitWarning")) {
+      if (aQuitType == "lastwindow") {
+        // If aQuitType is "lastwindow" and we aren't showing the quit warning,
+        // we should show the window closing warning instead. warnAboutClosing
+        // tabs checks browser.tabs.warnOnClose and returns if it's ok to close
+        // the window. It doesn't actually close the window.
+        aCancelQuit.data =
+          !win.gBrowser.warnAboutClosingTabs(win.gBrowser.closingTabsEnum.ALL);
+      }
+      return;
+    }
+
+    let prompt = Services.prompt;
+    let quitBundle = Services.strings.createBundle("chrome://browser/locale/quitDialog.properties");
+    let appName = gBrandBundle.GetStringFromName("brandShortName");
+    let quitDialogTitle = quitBundle.formatStringFromName("quitDialogTitle",
+                                                          [appName], 1);
+    let neverAskText = quitBundle.GetStringFromName("neverAsk2");
+    let neverAsk = {value: false};
+
+    let choice;
+    if (allWindowsPrivate) {
+      let text = quitBundle.formatStringFromName("messagePrivate", [appName], 1);
+      let flags = prompt.BUTTON_TITLE_IS_STRING * prompt.BUTTON_POS_0 +
+                  prompt.BUTTON_TITLE_IS_STRING * prompt.BUTTON_POS_1 +
+                  prompt.BUTTON_POS_0_DEFAULT;
+      choice = prompt.confirmEx(win, quitDialogTitle, text, flags,
+                                quitBundle.GetStringFromName("quitTitle"),
+                                quitBundle.GetStringFromName("cancelTitle"),
+                                null,
+                                neverAskText, neverAsk);
+
+      // The order of the buttons differs between the prompt.confirmEx calls
+      // here so we need to fix this for proper handling below.
+      if (choice == 0) {
+        choice = 2;
+      }
+    } else {
+      let text = quitBundle.formatStringFromName(
+        windowcount == 1 ? "messageNoWindows" : "message", [appName], 1);
+      let flags = prompt.BUTTON_TITLE_IS_STRING * prompt.BUTTON_POS_0 +
+                  prompt.BUTTON_TITLE_IS_STRING * prompt.BUTTON_POS_1 +
+                  prompt.BUTTON_TITLE_IS_STRING * prompt.BUTTON_POS_2 +
+                  prompt.BUTTON_POS_0_DEFAULT;
+      choice = prompt.confirmEx(win, quitDialogTitle, text, flags,
+                                quitBundle.GetStringFromName("saveTitle"),
+                                quitBundle.GetStringFromName("cancelTitle"),
+                                quitBundle.GetStringFromName("quitTitle"),
+                                neverAskText, neverAsk);
+    }
+
+    switch (choice) {
+    case 2: // Quit
+      if (neverAsk.value)
+        Services.prefs.setBoolPref("browser.showQuitWarning", false);
+      break;
+    case 1: // Cancel
+      aCancelQuit.QueryInterface(Ci.nsISupportsPRBool);
+      aCancelQuit.data = true;
+      break;
+    case 0: // Save & Quit
+      this._saveSession = true;
+      if (neverAsk.value) {
+        // always save state when shutting down
+        Services.prefs.setIntPref("browser.startup.page", 3);
+      }
+      break;
+    }
+  },
+
+  _showUpdateNotification: function BG__showUpdateNotification() {
+    Services.prefs.clearUserPref("app.update.postupdate");
+
+    var um = Cc["@mozilla.org/updates/update-manager;1"].
+             getService(Ci.nsIUpdateManager);
+    try {
+      // If the updates.xml file is deleted then getUpdateAt will throw.
+      var update = um.getUpdateAt(0).QueryInterface(Ci.nsIPropertyBag);
+    }
+    catch (e) {
+      // This should never happen.
+      Cu.reportError("Unable to find update: " + e);
+      return;
+    }
+
+    var actions = update.getProperty("actions");
+    if (!actions || actions.indexOf("silent") != -1)
+      return;
+
+    var formatter = Cc["@mozilla.org/toolkit/URLFormatterService;1"].
+                    getService(Ci.nsIURLFormatter);
+    var appName = gBrandBundle.GetStringFromName("brandShortName");
+
+    function getNotifyString(aPropData) {
+      var propValue = update.getProperty(aPropData.propName);
+      if (!propValue) {
+        if (aPropData.prefName)
+          propValue = formatter.formatURLPref(aPropData.prefName);
+        else if (aPropData.stringParams)
+          propValue = gBrowserBundle.formatStringFromName(aPropData.stringName,
+                                                          aPropData.stringParams,
+                                                          aPropData.stringParams.length);
+        else
+          propValue = gBrowserBundle.GetStringFromName(aPropData.stringName);
+      }
+      return propValue;
+    }
+
+    if (actions.indexOf("showNotification") != -1) {
+      let text = getNotifyString({propName: "notificationText",
+                                  stringName: "puNotifyText",
+                                  stringParams: [appName]});
+      let url = getNotifyString({propName: "notificationURL",
+                                 prefName: "startup.homepage_override_url"});
+      let label = getNotifyString({propName: "notificationButtonLabel",
+                                   stringName: "pu.notifyButton.label"});
+      let key = getNotifyString({propName: "notificationButtonAccessKey",
+                                 stringName: "pu.notifyButton.accesskey"});
+
+      let win = RecentWindow.getMostRecentBrowserWindow();
+      let notifyBox = win.document.getElementById("high-priority-global-notificationbox");
+
+      let buttons = [
+                      {
+                        label:     label,
+                        accessKey: key,
+                        popup:     null,
+                        callback: function(aNotificationBar, aButton) {
+                          win.openUILinkIn(url, "tab");
+                        }
+                      }
+                    ];
+
+      notifyBox.appendNotification(text, "post-update-notification",
+                                   null, notifyBox.PRIORITY_INFO_LOW,
+                                   buttons);
+    }
+
+    if (actions.indexOf("showAlert") == -1)
+      return;
+
+    let title = getNotifyString({propName: "alertTitle",
+                                 stringName: "puAlertTitle",
+                                 stringParams: [appName]});
+    let text = getNotifyString({propName: "alertText",
+                                stringName: "puAlertText",
+                                stringParams: [appName]});
+    let url = getNotifyString({propName: "alertURL",
+                               prefName: "startup.homepage_override_url"});
+
+    function clickCallback(subject, topic, data) {
+      // This callback will be called twice but only once with this topic
+      if (topic != "alertclickcallback")
+        return;
+      let win = RecentWindow.getMostRecentBrowserWindow();
+      win.openUILinkIn(data, "tab");
+    }
+
+    try {
+      // This will throw NS_ERROR_NOT_AVAILABLE if the notification cannot
+      // be displayed per the idl.
+      AlertsService.showAlertNotification(null, title, text,
+                                          true, url, clickCallback);
+    }
+    catch (e) {
+      Cu.reportError(e);
+    }
+  },
+
+  /**
+   * Initialize Places
+   * - imports the bookmarks html file if bookmarks database is empty, try to
+   *   restore bookmarks from a JSON backup if the backend indicates that the
+   *   database was corrupt.
+   *
+   * These prefs can be set up by the frontend:
+   *
+   * WARNING: setting these preferences to true will overwite existing bookmarks
+   *
+   * - browser.places.importBookmarksHTML
+   *   Set to true will import the bookmarks.html file from the profile folder.
+   * - browser.places.smartBookmarksVersion
+   *   Set during HTML import to indicate that Smart Bookmarks were created.
+   *   Set to -1 to disable Smart Bookmarks creation.
+   *   Set to 0 to restore current Smart Bookmarks.
+   * - browser.bookmarks.restore_default_bookmarks
+   *   Set to true by safe-mode dialog to indicate we must restore default
+   *   bookmarks.
+   */
+  _initPlaces: function BG__initPlaces(aInitialMigrationPerformed) {
+    // We must instantiate the history service since it will tell us if we
+    // need to import or restore bookmarks due to first-run, corruption or
+    // forced migration (due to a major schema change).
+    // If the database is corrupt or has been newly created we should
+    // import bookmarks.
+    let dbStatus = PlacesUtils.history.databaseStatus;
+    let importBookmarks = !aInitialMigrationPerformed &&
+                          (dbStatus == PlacesUtils.history.DATABASE_STATUS_CREATE ||
+                           dbStatus == PlacesUtils.history.DATABASE_STATUS_CORRUPT);
+
+    // Check if user or an extension has required to import bookmarks.html
+    let importBookmarksHTML = false;
+    try {
+      importBookmarksHTML =
+        Services.prefs.getBoolPref("browser.places.importBookmarksHTML");
+      if (importBookmarksHTML)
+        importBookmarks = true;
+    } catch (ex) {}
+
+    // Support legacy bookmarks.html format for apps that depend on that format.
+    let autoExportHTML = false;
+    try {
+      autoExportHTML = Services.prefs.getBoolPref("browser.bookmarks.autoExportHTML");
+    } catch (ex) {} // Do not export.
+    if (autoExportHTML) {
+      // Sqlite.jsm and Places shutdown happen at profile-before-change, thus,
+      // to be on the safe side, this should run earlier.
+      AsyncShutdown.profileChangeTeardown.addBlocker(
+        "Places: export bookmarks.html",
+        () => BookmarkHTMLUtils.exportToFile(BookmarkHTMLUtils.defaultPath));
+    }
+
+    Task.spawn(function* () {
+      // Check if Safe Mode or the user has required to restore bookmarks from
+      // default profile's bookmarks.html
+      let restoreDefaultBookmarks = false;
+      try {
+        restoreDefaultBookmarks =
+          Services.prefs.getBoolPref("browser.bookmarks.restore_default_bookmarks");
+        if (restoreDefaultBookmarks) {
+          // Ensure that we already have a bookmarks backup for today.
+          yield this._backupBookmarks();
+          importBookmarks = true;
+        }
+      } catch (ex) {}
+
+      // This may be reused later, check for "=== undefined" to see if it has
+      // been populated already.
+      let lastBackupFile;
+
+      // If the user did not require to restore default bookmarks, or import
+      // from bookmarks.html, we will try to restore from JSON
+      if (importBookmarks && !restoreDefaultBookmarks && !importBookmarksHTML) {
+        // get latest JSON backup
+        lastBackupFile = yield PlacesBackups.getMostRecentBackup();
+        if (lastBackupFile) {
+          // restore from JSON backup
+          yield BookmarkJSONUtils.importFromFile(lastBackupFile, true);
+          importBookmarks = false;
+        }
+        else {
+          // We have created a new database but we don't have any backup available
+          importBookmarks = true;
+          if (yield OS.File.exists(BookmarkHTMLUtils.defaultPath)) {
+            // If bookmarks.html is available in current profile import it...
+            importBookmarksHTML = true;
+          }
+          else {
+            // ...otherwise we will restore defaults
+            restoreDefaultBookmarks = true;
+          }
+        }
+      }
+
+      // If bookmarks are not imported, then initialize smart bookmarks.  This
+      // happens during a common startup.
+      // Otherwise, if any kind of import runs, smart bookmarks creation should be
+      // delayed till the import operations has finished.  Not doing so would
+      // cause them to be overwritten by the newly imported bookmarks.
+      if (!importBookmarks) {
+        // Now apply distribution customized bookmarks.
+        // This should always run after Places initialization.
+        try {
+          yield this._distributionCustomizer.applyBookmarks();
+          yield this.ensurePlacesDefaultQueriesInitialized();
+        } catch (e) {
+          Cu.reportError(e);
+        }
+      }
+      else {
+        // An import operation is about to run.
+        // Don't try to recreate smart bookmarks if autoExportHTML is true or
+        // smart bookmarks are disabled.
+        let smartBookmarksVersion = 0;
+        try {
+          smartBookmarksVersion = Services.prefs.getIntPref("browser.places.smartBookmarksVersion");
+        } catch (ex) {}
+        if (!autoExportHTML && smartBookmarksVersion != -1)
+          Services.prefs.setIntPref("browser.places.smartBookmarksVersion", 0);
+
+        let bookmarksUrl = null;
+        if (restoreDefaultBookmarks) {
+          // User wants to restore bookmarks.html file from default profile folder
+          bookmarksUrl = "chrome://browser/locale/bookmarks.html";
+        }
+        else if (yield OS.File.exists(BookmarkHTMLUtils.defaultPath)) {
+          bookmarksUrl = OS.Path.toFileURI(BookmarkHTMLUtils.defaultPath);
+        }
+
+        if (bookmarksUrl) {
+          // Import from bookmarks.html file.
+          try {
+            yield BookmarkHTMLUtils.importFromURL(bookmarksUrl, true);
+          } catch (e) {
+            Cu.reportError("Bookmarks.html file could be corrupt. " + e);
+          }
+          try {
+            // Now apply distribution customized bookmarks.
+            // This should always run after Places initialization.
+            yield this._distributionCustomizer.applyBookmarks();
+            // Ensure that smart bookmarks are created once the operation is
+            // complete.
+            yield this.ensurePlacesDefaultQueriesInitialized();
+          } catch (e) {
+            Cu.reportError(e);
+          }
+
+        }
+        else {
+          Cu.reportError(new Error("Unable to find bookmarks.html file."));
+        }
+
+        // Reset preferences, so we won't try to import again at next run
+        if (importBookmarksHTML)
+          Services.prefs.setBoolPref("browser.places.importBookmarksHTML", false);
+        if (restoreDefaultBookmarks)
+          Services.prefs.setBoolPref("browser.bookmarks.restore_default_bookmarks",
+                                     false);
+      }
+
+      // Initialize bookmark archiving on idle.
+      if (!this._bookmarksBackupIdleTime) {
+        this._bookmarksBackupIdleTime = BOOKMARKS_BACKUP_IDLE_TIME_SEC;
+
+        // If there is no backup, or the last bookmarks backup is too old, use
+        // a more aggressive idle observer.
+        if (lastBackupFile === undefined)
+          lastBackupFile = yield PlacesBackups.getMostRecentBackup();
+        if (!lastBackupFile) {
+            this._bookmarksBackupIdleTime /= 2;
+        }
+        else {
+          let lastBackupTime = PlacesBackups.getDateForFile(lastBackupFile);
+          let profileLastUse = Services.appinfo.replacedLockTime || Date.now();
+
+          // If there is a backup after the last profile usage date it's fine,
+          // regardless its age.  Otherwise check how old is the last
+          // available backup compared to that session.
+          if (profileLastUse > lastBackupTime) {
+            let backupAge = Math.round((profileLastUse - lastBackupTime) / 86400000);
+            // Report the age of the last available backup.
+            try {
+              Services.telemetry
+                      .getHistogramById("PLACES_BACKUPS_DAYSFROMLAST")
+                      .add(backupAge);
+            } catch (ex) {
+              Cu.reportError(new Error("Unable to report telemetry."));
+            }
+
+            if (backupAge > BOOKMARKS_BACKUP_MAX_INTERVAL_DAYS)
+              this._bookmarksBackupIdleTime /= 2;
+          }
+        }
+        this._idleService.addIdleObserver(this, this._bookmarksBackupIdleTime);
+      }
+
+    }.bind(this)).catch(ex => {
+      Cu.reportError(ex);
+    }).then(() => {
+      // NB: deliberately after the catch so that we always do this, even if
+      // we threw halfway through initializing in the Task above.
+      Services.obs.notifyObservers(null, "places-browser-init-complete", "");
+    });
+  },
+
+  /**
+   * If a backup for today doesn't exist, this creates one.
+   */
+  _backupBookmarks: function BG__backupBookmarks() {
+    return Task.spawn(function*() {
+      let lastBackupFile = yield PlacesBackups.getMostRecentBackup();
+      // Should backup bookmarks if there are no backups or the maximum
+      // interval between backups elapsed.
+      if (!lastBackupFile ||
+          new Date() - PlacesBackups.getDateForFile(lastBackupFile) > BOOKMARKS_BACKUP_MIN_INTERVAL_DAYS * 86400000) {
+        let maxBackups = Services.prefs.getIntPref("browser.bookmarks.max_backups");
+        yield PlacesBackups.create(maxBackups);
+      }
+    });
+  },
+
+  /**
+   * Show the notificationBox for a locked places database.
+   */
+  _showPlacesLockedNotificationBox: function BG__showPlacesLockedNotificationBox() {
+    var applicationName = gBrandBundle.GetStringFromName("brandShortName");
+    var placesBundle = Services.strings.createBundle("chrome://browser/locale/places/places.properties");
+    var title = placesBundle.GetStringFromName("lockPrompt.title");
+    var text = placesBundle.formatStringFromName("lockPrompt.text", [applicationName], 1);
+    var buttonText = placesBundle.GetStringFromName("lockPromptInfoButton.label");
+    var accessKey = placesBundle.GetStringFromName("lockPromptInfoButton.accessKey");
+
+    var helpTopic = "places-locked";
+    var url = Cc["@mozilla.org/toolkit/URLFormatterService;1"].
+              getService(Components.interfaces.nsIURLFormatter).
+              formatURLPref("app.support.baseURL");
+    url += helpTopic;
+
+    var win = RecentWindow.getMostRecentBrowserWindow();
+
+    var buttons = [
+                    {
+                      label:     buttonText,
+                      accessKey: accessKey,
+                      popup:     null,
+                      callback:  function(aNotificationBar, aButton) {
+                        win.openUILinkIn(url, "tab");
+                      }
+                    }
+                  ];
+
+    var notifyBox = win.gBrowser.getNotificationBox();
+    var notification = notifyBox.appendNotification(text, title, null,
+                                                    notifyBox.PRIORITY_CRITICAL_MEDIUM,
+                                                    buttons);
+    notification.persistence = -1; // Until user closes it
+  },
+
+  _showSyncStartedDoorhanger: function () {
+    let bundle = Services.strings.createBundle("chrome://browser/locale/accounts.properties");
+    let productName = gBrandBundle.GetStringFromName("brandShortName");
+    let title = bundle.GetStringFromName("syncStartNotification.title");
+    let body = bundle.formatStringFromName("syncStartNotification.body2",
+                                            [productName], 1);
+
+    let clickCallback = (subject, topic, data) => {
+      if (topic != "alertclickcallback")
+        return;
+      this._openPreferences("sync");
+    }
+    AlertsService.showAlertNotification(null, title, body, true, null, clickCallback);
+  },
+
+  _migrateUI: function BG__migrateUI() {
+    const UI_VERSION = 42;
+    const BROWSER_DOCURL = "chrome://browser/content/browser.xul";
+
+    let currentUIVersion;
+    if (Services.prefs.prefHasUserValue("browser.migration.version")) {
+      currentUIVersion = Services.prefs.getIntPref("browser.migration.version");
+    } else {
+      // This is a new profile, nothing to migrate.
+      Services.prefs.setIntPref("browser.migration.version", UI_VERSION);
+      return;
+    }
+
+    if (currentUIVersion >= UI_VERSION)
+      return;
+
+    let xulStore = Cc["@mozilla.org/xul/xulstore;1"].getService(Ci.nsIXULStore);
+
+    if (currentUIVersion < 9) {
+      // This code adds the customizable downloads buttons.
+      let currentset = xulStore.getValue(BROWSER_DOCURL, "nav-bar", "currentset");
+
+      // Since the Downloads button is located in the navigation bar by default,
+      // migration needs to happen only if the toolbar was customized using a
+      // previous UI version, and the button was not already placed on the
+      // toolbar manually.
+      if (currentset &&
+          currentset.indexOf("downloads-button") == -1) {
+        // The element is added either after the search bar or before the home
+        // button. As a last resort, the element is added just before the
+        // non-customizable window controls.
+        if (currentset.indexOf("search-container") != -1) {
+          currentset = currentset.replace(/(^|,)search-container($|,)/,
+                                          "$1search-container,downloads-button$2")
+        } else if (currentset.indexOf("home-button") != -1) {
+          currentset = currentset.replace(/(^|,)home-button($|,)/,
+                                          "$1downloads-button,home-button$2")
+        } else {
+          currentset = currentset.replace(/(^|,)window-controls($|,)/,
+                                          "$1downloads-button,window-controls$2")
+        }
+        xulStore.setValue(BROWSER_DOCURL, "nav-bar", "currentset", currentset);
+      }
+    }
+
+    if (AppConstants.platform == "win") {
+      if (currentUIVersion < 10) {
+        // For Windows systems with display set to > 96dpi (i.e. systemDefaultScale
+        // will return a value > 1.0), we want to discard any saved full-zoom settings,
+        // as we'll now be scaling the content according to the system resolution
+        // scale factor (Windows "logical DPI" setting)
+        let sm = Cc["@mozilla.org/gfx/screenmanager;1"].getService(Ci.nsIScreenManager);
+        if (sm.systemDefaultScale > 1.0) {
+          let cps2 = Cc["@mozilla.org/content-pref/service;1"].
+                     getService(Ci.nsIContentPrefService2);
+          cps2.removeByName("browser.content.full-zoom", null);
+        }
+      }
+    }
+
+    if (currentUIVersion < 11) {
+      Services.prefs.clearUserPref("dom.disable_window_move_resize");
+      Services.prefs.clearUserPref("dom.disable_window_flip");
+      Services.prefs.clearUserPref("dom.event.contextmenu.enabled");
+      Services.prefs.clearUserPref("javascript.enabled");
+      Services.prefs.clearUserPref("permissions.default.image");
+    }
+
+    if (currentUIVersion < 14) {
+      // DOM Storage doesn't specially handle about: pages anymore.
+      let path = OS.Path.join(OS.Constants.Path.profileDir,
+                              "chromeappsstore.sqlite");
+      OS.File.remove(path);
+    }
+
+    if (currentUIVersion < 16) {
+      xulStore.removeValue(BROWSER_DOCURL, "nav-bar", "collapsed");
+    }
+
+    // Insert the bookmarks-menu-button into the nav-bar if it isn't already
+    // there.
+    if (currentUIVersion < 17) {
+      let currentset = xulStore.getValue(BROWSER_DOCURL, "nav-bar", "currentset");
+      // Need to migrate only if toolbar is customized.
+      if (currentset) {
+        if (!currentset.includes("bookmarks-menu-button")) {
+          // The button isn't in the nav-bar, so let's look for an appropriate
+          // place to put it.
+          if (currentset.includes("bookmarks-menu-button-container")) {
+            currentset = currentset.replace(/(^|,)bookmarks-menu-button-container($|,)/,
+                                            "$1bookmarks-menu-button$2");
+          } else if (currentset.includes("downloads-button")) {
+            currentset = currentset.replace(/(^|,)downloads-button($|,)/,
+                                            "$1bookmarks-menu-button,downloads-button$2");
+          } else if (currentset.includes("home-button")) {
+            currentset = currentset.replace(/(^|,)home-button($|,)/,
+                                            "$1bookmarks-menu-button,home-button$2");
+          } else {
+            // Just append.
+            currentset = currentset.replace(/(^|,)window-controls($|,)/,
+                                            "$1bookmarks-menu-button,window-controls$2")
+          }
+          xulStore.setValue(BROWSER_DOCURL, "nav-bar", "currentset", currentset);
+        }
+      }
+    }
+
+    if (currentUIVersion < 18) {
+      // Remove iconsize and mode from all the toolbars
+      let toolbars = ["navigator-toolbox", "nav-bar", "PersonalToolbar",
+                      "addon-bar", "TabsToolbar", "toolbar-menubar"];
+      for (let resourceName of ["mode", "iconsize"]) {
+        for (let toolbarId of toolbars) {
+          xulStore.removeValue(BROWSER_DOCURL, toolbarId, resourceName);
+        }
+      }
+    }
+
+    if (currentUIVersion < 19) {
+      let detector = null;
+      try {
+        detector = Services.prefs.getComplexValue("intl.charset.detector",
+                                                  Ci.nsIPrefLocalizedString).data;
+      } catch (ex) {}
+      if (!(detector == "" ||
+            detector == "ja_parallel_state_machine" ||
+            detector == "ruprob" ||
+            detector == "ukprob")) {
+        // If the encoding detector pref value is not reachable from the UI,
+        // reset to default (varies by localization).
+        Services.prefs.clearUserPref("intl.charset.detector");
+      }
+    }
+
+    if (currentUIVersion < 20) {
+      // Remove persisted collapsed state from TabsToolbar.
+      xulStore.removeValue(BROWSER_DOCURL, "TabsToolbar", "collapsed");
+    }
+
+    if (currentUIVersion < 23) {
+      const kSelectedEnginePref = "browser.search.selectedEngine";
+      if (Services.prefs.prefHasUserValue(kSelectedEnginePref)) {
+        try {
+          let name = Services.prefs.getComplexValue(kSelectedEnginePref,
+                                                    Ci.nsIPrefLocalizedString).data;
+          Services.search.currentEngine = Services.search.getEngineByName(name);
+        } catch (ex) {}
+      }
+    }
+
+    if (currentUIVersion < 24) {
+      // Reset homepage pref for users who have it set to start.mozilla.org
+      // or google.com/firefox.
+      const HOMEPAGE_PREF = "browser.startup.homepage";
+      if (Services.prefs.prefHasUserValue(HOMEPAGE_PREF)) {
+        const DEFAULT =
+          Services.prefs.getDefaultBranch(HOMEPAGE_PREF)
+                        .getComplexValue("", Ci.nsIPrefLocalizedString).data;
+        let value =
+          Services.prefs.getComplexValue(HOMEPAGE_PREF, Ci.nsISupportsString);
+        let updated =
+          value.data.replace(/https?:\/\/start\.mozilla\.org[^|]*/i, DEFAULT)
+                    .replace(/https?:\/\/(www\.)?google\.[a-z.]+\/firefox[^|]*/i,
+                             DEFAULT);
+        if (updated != value.data) {
+          if (updated == DEFAULT) {
+            Services.prefs.clearUserPref(HOMEPAGE_PREF);
+          } else {
+            value.data = updated;
+            Services.prefs.setComplexValue(HOMEPAGE_PREF,
+                                           Ci.nsISupportsString, value);
+          }
+        }
+      }
+    }
+
+    if (currentUIVersion < 25) {
+      // Make sure the doNotTrack value conforms to the conversion from
+      // three-state to two-state. (This reverts a setting of "please track me"
+      // to the default "don't say anything").
+      try {
+        if (Services.prefs.getBoolPref("privacy.donottrackheader.enabled") &&
+            Services.prefs.getIntPref("privacy.donottrackheader.value") != 1) {
+          Services.prefs.clearUserPref("privacy.donottrackheader.enabled");
+          Services.prefs.clearUserPref("privacy.donottrackheader.value");
+        }
+      }
+      catch (ex) {}
+    }
+
+    if (currentUIVersion < 26) {
+      // Refactor urlbar suggestion preferences to make it extendable and
+      // allow new suggestion types (e.g: search suggestions).
+      let types = ["history", "bookmark", "openpage"];
+      let defaultBehavior = 0;
+      try {
+        defaultBehavior = Services.prefs.getIntPref("browser.urlbar.default.behavior");
+      } catch (ex) {}
+      try {
+        let autocompleteEnabled = Services.prefs.getBoolPref("browser.urlbar.autocomplete.enabled");
+        if (!autocompleteEnabled) {
+          defaultBehavior = -1;
+        }
+      } catch (ex) {}
+
+      // If the default behavior is:
+      //    -1  - all new "...suggest.*" preferences will be false
+      //     0  - all new "...suggest.*" preferences will use the default values
+      //   > 0  - all new "...suggest.*" preferences will be inherited
+      for (let type of types) {
+        let prefValue = defaultBehavior == 0;
+        if (defaultBehavior > 0) {
+          prefValue = !!(defaultBehavior & Ci.mozIPlacesAutoComplete["BEHAVIOR_" + type.toUpperCase()]);
+        }
+        Services.prefs.setBoolPref("browser.urlbar.suggest." + type, prefValue);
+      }
+
+      // Typed behavior will be used only for results from history.
+      if (defaultBehavior != -1 &&
+          !!(defaultBehavior & Ci.mozIPlacesAutoComplete["BEHAVIOR_TYPED"])) {
+        Services.prefs.setBoolPref("browser.urlbar.suggest.history.onlyTyped", true);
+      }
+    }
+
+    if (currentUIVersion < 27) {
+      // Fix up document color use:
+      const kOldColorPref = "browser.display.use_document_colors";
+      if (Services.prefs.prefHasUserValue(kOldColorPref) &&
+          !Services.prefs.getBoolPref(kOldColorPref)) {
+        Services.prefs.setIntPref("browser.display.document_color_use", 2);
+      }
+    }
+
+    if (currentUIVersion < 29) {
+      let group = null;
+      try {
+        group = Services.prefs.getComplexValue("font.language.group",
+                                               Ci.nsIPrefLocalizedString);
+      } catch (ex) {}
+      if (group &&
+          ["tr", "x-baltic", "x-central-euro"].some(g => g == group.data)) {
+        // Latin groups were consolidated.
+        group.data = "x-western";
+        Services.prefs.setComplexValue("font.language.group",
+                                       Ci.nsIPrefLocalizedString, group);
+      }
+    }
+
+    if (currentUIVersion < 30) {
+      // Convert old devedition theme pref to lightweight theme storage
+      let lightweightThemeSelected = false;
+      let selectedThemeID = null;
+      try {
+        lightweightThemeSelected = Services.prefs.prefHasUserValue("lightweightThemes.selectedThemeID");
+        selectedThemeID = Services.prefs.getCharPref("lightweightThemes.selectedThemeID");
+      } catch (e) {}
+
+      let defaultThemeSelected = false;
+      try {
+         defaultThemeSelected = Services.prefs.getCharPref("general.skins.selectedSkin") == "classic/1.0";
+      } catch (e) {}
+
+      // If we are on the devedition channel, the devedition theme is on by
+      // default.  But we need to handle the case where they didn't want it
+      // applied, and unapply the theme.
+      let userChoseToNotUseDeveditionTheme =
+        !defaultThemeSelected ||
+        (lightweightThemeSelected && selectedThemeID != "firefox-devedition@mozilla.org");
+
+      if (userChoseToNotUseDeveditionTheme && selectedThemeID == "firefox-devedition@mozilla.org") {
+        Services.prefs.setCharPref("lightweightThemes.selectedThemeID", "");
+      }
+
+      Services.prefs.clearUserPref("browser.devedition.showCustomizeButton");
+    }
+
+    if (currentUIVersion < 31) {
+      xulStore.removeValue(BROWSER_DOCURL, "bookmarks-menu-button", "class");
+      xulStore.removeValue(BROWSER_DOCURL, "home-button", "class");
+    }
+
+    if (currentUIVersion < 32) {
+      this._notifyNotificationsUpgrade().catch(Cu.reportError);
+    }
+
+    // version 35 migrated tab groups data.
+
+    if (currentUIVersion < 36) {
+      xulStore.removeValue("chrome://passwordmgr/content/passwordManager.xul",
+                           "passwordCol",
+                           "hidden");
+    }
+
+    if (currentUIVersion < 37) {
+      Services.prefs.clearUserPref("browser.sessionstore.restore_on_demand");
+    }
+
+    if (currentUIVersion < 38) {
+      LoginHelper.removeLegacySignonFiles();
+    }
+
+    if (currentUIVersion < 39) {
+      // Remove the 'defaultset' value for all the toolbars
+      let toolbars = ["nav-bar", "PersonalToolbar",
+                      "addon-bar", "TabsToolbar", "toolbar-menubar"];
+      for (let toolbarId of toolbars) {
+        xulStore.removeValue(BROWSER_DOCURL, toolbarId, "defaultset");
+      }
+    }
+
+    if (currentUIVersion < 40) {
+      const kOldSafeBrowsingPref = "browser.safebrowsing.enabled";
+      // Default value is set to true, a user pref means that the pref was
+      // set to false.
+      if (Services.prefs.prefHasUserValue(kOldSafeBrowsingPref) &&
+          !Services.prefs.getBoolPref(kOldSafeBrowsingPref)) {
+        Services.prefs.setBoolPref("browser.safebrowsing.phishing.enabled",
+                                   false);
+        // Should just remove support for the pref entirely, even if it's
+        // only in about:config
+        Services.prefs.clearUserPref(kOldSafeBrowsingPref);
+      }
+    }
+
+    if (currentUIVersion < 41) {
+      const Preferences = Cu.import("resource://gre/modules/Preferences.jsm", {}).Preferences;
+      Preferences.resetBranch("loop.");
+    }
+
+    if (currentUIVersion < 42) {
+      let backupFile = Services.dirsvc.get("ProfD", Ci.nsIFile);
+      backupFile.append("tabgroups-session-backup.json");
+      OS.File.remove(backupFile.path, {ignoreAbsent: true}).catch(ex => Cu.reportError(ex));
+    }
+
+    // Update the migration version.
+    Services.prefs.setIntPref("browser.migration.version", UI_VERSION);
+  },
+
+  _hasExistingNotificationPermission: function BG__hasExistingNotificationPermission() {
+    let enumerator = Services.perms.enumerator;
+    while (enumerator.hasMoreElements()) {
+      let permission = enumerator.getNext().QueryInterface(Ci.nsIPermission);
+      if (permission.type == "desktop-notification") {
+        return true;
+      }
+    }
+    return false;
+  },
+
+  _notifyNotificationsUpgrade: Task.async(function* () {
+    if (!this._hasExistingNotificationPermission()) {
+      return;
+    }
+    yield this._firstWindowReady;
+    function clickCallback(subject, topic, data) {
+      if (topic != "alertclickcallback")
+        return;
+      let win = RecentWindow.getMostRecentBrowserWindow();
+      win.openUILinkIn(data, "tab");
+    }
+    // Show the application icon for XUL notifications. We assume system-level
+    // notifications will include their own icon.
+    let imageURL = this._hasSystemAlertsService() ? "" :
+                   "chrome://branding/content/about-logo.png";
+    let title = gBrowserBundle.GetStringFromName("webNotifications.upgradeTitle");
+    let text = gBrowserBundle.GetStringFromName("webNotifications.upgradeBody");
+    let url = Services.urlFormatter.formatURLPref("app.support.baseURL") +
+      "push#w_upgraded-notifications";
+
+    AlertsService.showAlertNotification(imageURL, title, text,
+                                        true, url, clickCallback);
+  }),
+
+  _hasSystemAlertsService: function() {
+    try {
+      return !!Cc["@mozilla.org/system-alerts-service;1"].getService(
+        Ci.nsIAlertsService);
+    } catch (e) {}
+    return false;
+  },
+
+  // ------------------------------
+  // public nsIBrowserGlue members
+  // ------------------------------
+
+  sanitize: function BG_sanitize(aParentWindow) {
+    this._sanitizer.sanitize(aParentWindow);
+  },
+
+  ensurePlacesDefaultQueriesInitialized: Task.async(function* () {
+    // This is the current smart bookmarks version, it must be increased every
+    // time they change.
+    // When adding a new smart bookmark below, its newInVersion property must
+    // be set to the version it has been added in.  We will compare its value
+    // to users' smartBookmarksVersion and add new smart bookmarks without
+    // recreating old deleted ones.
+    const SMART_BOOKMARKS_VERSION = 8;
+    const SMART_BOOKMARKS_ANNO = "Places/SmartBookmark";
+    const SMART_BOOKMARKS_PREF = "browser.places.smartBookmarksVersion";
+
+    // TODO bug 399268: should this be a pref?
+    const MAX_RESULTS = 10;
+
+    // Get current smart bookmarks version.  If not set, create them.
+    let smartBookmarksCurrentVersion = 0;
+    try {
+      smartBookmarksCurrentVersion = Services.prefs.getIntPref(SMART_BOOKMARKS_PREF);
+    } catch (ex) {}
+
+    // If version is current, or smart bookmarks are disabled, bail out.
+    if (smartBookmarksCurrentVersion == -1 ||
+        smartBookmarksCurrentVersion >= SMART_BOOKMARKS_VERSION) {
+      return;
+    }
+
+    try {
+      let menuIndex = 0;
+      let toolbarIndex = 0;
+      let bundle = Services.strings.createBundle("chrome://browser/locale/places/places.properties");
+      let queryOptions = Ci.nsINavHistoryQueryOptions;
+
+      let smartBookmarks = {
+        MostVisited: {
+          title: bundle.GetStringFromName("mostVisitedTitle"),
+          url: "place:sort=" + queryOptions.SORT_BY_VISITCOUNT_DESCENDING +
+                    "&maxResults=" + MAX_RESULTS,
+          parentGuid: PlacesUtils.bookmarks.toolbarGuid,
+          newInVersion: 1
+        },
+        RecentTags: {
+          title: bundle.GetStringFromName("recentTagsTitle"),
+          url: "place:type=" + queryOptions.RESULTS_AS_TAG_QUERY +
+                    "&sort=" + queryOptions.SORT_BY_LASTMODIFIED_DESCENDING +
+                    "&maxResults=" + MAX_RESULTS,
+          parentGuid: PlacesUtils.bookmarks.menuGuid,
+          newInVersion: 1
+        },
+      };
+
+      // Set current guid, parentGuid and index of existing Smart Bookmarks.
+      // We will use those to create a new version of the bookmark at the same
+      // position.
+      let smartBookmarkItemIds = PlacesUtils.annotations.getItemsWithAnnotation(SMART_BOOKMARKS_ANNO);
+      for (let itemId of smartBookmarkItemIds) {
+        let queryId = PlacesUtils.annotations.getItemAnnotation(itemId, SMART_BOOKMARKS_ANNO);
+        if (queryId in smartBookmarks) {
+          // Known smart bookmark.
+          let smartBookmark = smartBookmarks[queryId];
+          smartBookmark.guid = yield PlacesUtils.promiseItemGuid(itemId);
+
+          if (!smartBookmark.url) {
+            yield PlacesUtils.bookmarks.remove(smartBookmark.guid);
+            continue;
+          }
+
+          let bm = yield PlacesUtils.bookmarks.fetch(smartBookmark.guid);
+          smartBookmark.parentGuid = bm.parentGuid;
+          smartBookmark.index = bm.index;
+        }
+        else {
+          // We don't remove old Smart Bookmarks because user could still
+          // find them useful, or could have personalized them.
+          // Instead we remove the Smart Bookmark annotation.
+          PlacesUtils.annotations.removeItemAnnotation(itemId, SMART_BOOKMARKS_ANNO);
+        }
+      }
+
+      for (let queryId of Object.keys(smartBookmarks)) {
+        let smartBookmark = smartBookmarks[queryId];
+
+        // We update or create only changed or new smart bookmarks.
+        // Also we respect user choices, so we won't try to create a smart
+        // bookmark if it has been removed.
+        if (smartBookmarksCurrentVersion > 0 &&
+            smartBookmark.newInVersion <= smartBookmarksCurrentVersion &&
+            !smartBookmark.guid || !smartBookmark.url)
+          continue;
+
+        // Remove old version of the smart bookmark if it exists, since it
+        // will be replaced in place.
+        if (smartBookmark.guid) {
+          yield PlacesUtils.bookmarks.remove(smartBookmark.guid);
+        }
+
+        // Create the new smart bookmark and store its updated guid.
+        if (!("index" in smartBookmark)) {
+          if (smartBookmark.parentGuid == PlacesUtils.bookmarks.toolbarGuid)
+            smartBookmark.index = toolbarIndex++;
+          else if (smartBookmark.parentGuid == PlacesUtils.bookmarks.menuGuid)
+            smartBookmark.index = menuIndex++;
+        }
+        smartBookmark = yield PlacesUtils.bookmarks.insert(smartBookmark);
+        let itemId = yield PlacesUtils.promiseItemId(smartBookmark.guid);
+        PlacesUtils.annotations.setItemAnnotation(itemId,
+                                                  SMART_BOOKMARKS_ANNO,
+                                                  queryId, 0,
+                                                  PlacesUtils.annotations.EXPIRE_NEVER);
+      }
+
+      // If we are creating all Smart Bookmarks from ground up, add a
+      // separator below them in the bookmarks menu.
+      if (smartBookmarksCurrentVersion == 0 &&
+          smartBookmarkItemIds.length == 0) {
+        let bm = yield PlacesUtils.bookmarks.fetch({ parentGuid: PlacesUtils.bookmarks.menuGuid,
+                                                     index: menuIndex });
+        // Don't add a separator if the menu was empty or there is one already.
+        if (bm && bm.type != PlacesUtils.bookmarks.TYPE_SEPARATOR) {
+          yield PlacesUtils.bookmarks.insert({ type: PlacesUtils.bookmarks.TYPE_SEPARATOR,
+                                               parentGuid: PlacesUtils.bookmarks.menuGuid,
+                                               index: menuIndex });
+        }
+      }
+    } catch (ex) {
+      Cu.reportError(ex);
+    } finally {
+      Services.prefs.setIntPref(SMART_BOOKMARKS_PREF, SMART_BOOKMARKS_VERSION);
+      Services.prefs.savePrefFile(null);
+    }
+  }),
+
+  /**
+   * Open preferences even if there are no open windows.
+   */
+  _openPreferences(...args) {
+    if (Services.appShell.hiddenDOMWindow.openPreferences) {
+      Services.appShell.hiddenDOMWindow.openPreferences(...args);
+      return;
+    }
+
+    let chromeWindow = RecentWindow.getMostRecentBrowserWindow();
+    chromeWindow.openPreferences(...args);
+  },
+
+  /**
+   * Called as an observer when Sync's "display URIs" notification is fired.
+   *
+   * We open the received URIs in background tabs.
+   */
+  _onDisplaySyncURIs: function _onDisplaySyncURIs(data) {
+    try {
+      // The payload is wrapped weirdly because of how Sync does notifications.
+      const URIs = data.wrappedJSObject.object;
+
+      const findWindow = () => RecentWindow.getMostRecentBrowserWindow({private: false});
+
+      // win can be null, but it's ok, we'll assign it later in openTab()
+      let win = findWindow();
+
+      const openTab = URI => {
+        let tab;
+        if (!win) {
+          Services.appShell.hiddenDOMWindow.open(URI.uri);
+          win = findWindow();
+          tab = win.gBrowser.tabs[0];
+        } else {
+          tab = win.gBrowser.addTab(URI.uri);
+        }
+        tab.setAttribute("attention", true);
+        return tab;
+      };
+
+      const firstTab = openTab(URIs[0]);
+      URIs.slice(1).forEach(URI => openTab(URI));
+
+      let title, body;
+      const deviceName = Weave.Service.clientsEngine.getClientName(URIs[0].clientId);
+      const bundle = Services.strings.createBundle("chrome://browser/locale/accounts.properties");
+      if (URIs.length == 1) {
+        // Due to bug 1305895, tabs from iOS may not have device information, so
+        // we have separate strings to handle those cases. (See Also
+        // unnamedTabsArrivingNotificationNoDevice.body below)
+        if (deviceName) {
+          title = bundle.formatStringFromName("tabArrivingNotificationWithDevice.title", [deviceName], 1);
+        } else {
+          title = bundle.GetStringFromName("tabArrivingNotification.title");
+        }
+        // Use the page URL as the body. We strip the fragment and query to
+        // reduce size, and also format it the same way that the url bar would.
+        body = URIs[0].uri.replace(/[?#].*$/, "");
+        if (win.gURLBar) {
+          body = win.gURLBar.trimValue(body);
+        }
+      } else {
+        title = bundle.GetStringFromName("tabsArrivingNotification.title");
+        const allSameDevice = URIs.every(URI => URI.clientId == URIs[0].clientId);
+        const unknownDevice = allSameDevice && !deviceName;
+        let tabArrivingBody;
+        if (unknownDevice) {
+          tabArrivingBody = "unnamedTabsArrivingNotificationNoDevice.body";
+        } else if (allSameDevice) {
+          tabArrivingBody = "unnamedTabsArrivingNotification2.body";
+        } else {
+          tabArrivingBody = "unnamedTabsArrivingNotificationMultiple2.body"
+        }
+
+        body = bundle.GetStringFromName(tabArrivingBody);
+        body = PluralForm.get(URIs.length, body);
+        body = body.replace("#1", URIs.length);
+        body = body.replace("#2", deviceName);
+      }
+
+      const clickCallback = (subject, topic, data) => {
+        if (topic == "alertclickcallback") {
+          win.gBrowser.selectedTab = firstTab;
+        }
+      }
+
+      // Specify an icon because on Windows no icon is shown at the moment
+      let imageURL;
+      if (AppConstants.platform == "win") {
+        imageURL = "chrome://branding/content/icon64.png";
+      }
+      AlertsService.showAlertNotification(imageURL, title, body, true, null, clickCallback);
+    } catch (ex) {
+      Cu.reportError("Error displaying tab(s) received by Sync: " + ex);
+    }
+  },
+
+  _onDeviceDisconnected() {
+    let bundle = Services.strings.createBundle("chrome://browser/locale/accounts.properties");
+    let title = bundle.GetStringFromName("deviceDisconnectedNotification.title");
+    let body = bundle.GetStringFromName("deviceDisconnectedNotification.body");
+
+    let clickCallback = (subject, topic, data) => {
+      if (topic != "alertclickcallback")
+        return;
+      this._openPreferences("sync");
+    }
+    AlertsService.showAlertNotification(null, title, body, true, null, clickCallback);
+  },
+
+  _handleFlashHang: function() {
+    ++this._flashHangCount;
+    if (this._flashHangCount < 2) {
+      return;
+    }
+    // protected mode only applies to win32
+    if (Services.appinfo.XPCOMABI != "x86-msvc") {
+      return;
+    }
+
+    if (Services.prefs.getBoolPref("dom.ipc.plugins.flash.disable-protected-mode")) {
+      return;
+    }
+    if (!Services.prefs.getBoolPref("browser.flash-protected-mode-flip.enable")) {
+      return;
+    }
+    if (Services.prefs.getBoolPref("browser.flash-protected-mode-flip.done")) {
+      return;
+    }
+    Services.prefs.setBoolPref("dom.ipc.plugins.flash.disable-protected-mode", true);
+    Services.prefs.setBoolPref("browser.flash-protected-mode-flip.done", true);
+
+    let win = RecentWindow.getMostRecentBrowserWindow();
+    if (!win) {
+      return;
+    }
+    let productName = gBrandBundle.GetStringFromName("brandShortName");
+    let message = win.gNavigatorBundle.
+      getFormattedString("flashHang.message", [productName]);
+    let buttons = [{
+      label: win.gNavigatorBundle.getString("flashHang.helpButton.label"),
+      accessKey: win.gNavigatorBundle.getString("flashHang.helpButton.accesskey"),
+      callback: function() {
+        win.openUILinkIn("https://support.mozilla.org/kb/flash-protected-mode-autodisabled", "tab");
+      }
+    }];
+    let nb = win.document.getElementById("global-notificationbox");
+    nb.appendNotification(message, "flash-hang", null,
+                          nb.PRIORITY_INFO_MEDIUM, buttons);
+  },
+
+  // for XPCOM
+  classID:          Components.ID("{eab9012e-5f74-4cbc-b2b5-a590235513cc}"),
+
+  QueryInterface: XPCOMUtils.generateQI([Ci.nsIObserver,
+                                         Ci.nsISupportsWeakReference,
+                                         Ci.nsIBrowserGlue]),
+
+  // redefine the default factory for XPCOMUtils
+  _xpcom_factory: BrowserGlueServiceFactory,
+}
+
+/**
+ * ContentPermissionIntegration is responsible for showing the user
+ * simple permission prompts when content requests additional
+ * capabilities.
+ *
+ * While there are some built-in permission prompts, createPermissionPrompt
+ * can also be overridden by system add-ons or tests to provide new ones.
+ *
+ * This override ability is provided by Integration.jsm. See
+ * PermissionUI.jsm for an example of how to provide a new prompt
+ * from an add-on.
+ */
+const ContentPermissionIntegration = {
+  /**
+   * Creates a PermissionPrompt for a given permission type and
+   * nsIContentPermissionRequest.
+   *
+   * @param {string} type
+   *        The type of the permission request from content. This normally
+   *        matches the "type" field of an nsIContentPermissionType, but it
+   *        can be something else if the permission does not use the
+   *        nsIContentPermissionRequest model. Note that this type might also
+   *        be different from the permission key used in the permissions
+   *        database.
+   *        Example: "geolocation"
+   * @param {nsIContentPermissionRequest} request
+   *        The request for a permission from content.
+   * @return {PermissionPrompt} (see PermissionUI.jsm),
+   *         or undefined if the type cannot be handled.
+   */
+  createPermissionPrompt(type, request) {
+    switch (type) {
+      case "geolocation": {
+        return new PermissionUI.GeolocationPermissionPrompt(request);
+      }
+      case "desktop-notification": {
+        return new PermissionUI.DesktopNotificationPermissionPrompt(request);
+      }
+    }
+    return undefined;
+  },
+};
+
+function ContentPermissionPrompt() {}
+
+ContentPermissionPrompt.prototype = {
+  classID:          Components.ID("{d8903bf6-68d5-4e97-bcd1-e4d3012f721a}"),
+
+  QueryInterface: XPCOMUtils.generateQI([Ci.nsIContentPermissionPrompt]),
+
+  /**
+   * This implementation of nsIContentPermissionPrompt.prompt ensures
+   * that there's only one nsIContentPermissionType in the request,
+   * and that it's of type nsIContentPermissionType. Failing to
+   * satisfy either of these conditions will result in this method
+   * throwing NS_ERRORs. If the combined ContentPermissionIntegration
+   * cannot construct a prompt for this particular request, an
+   * NS_ERROR_FAILURE will be thrown.
+   *
+   * Any time an error is thrown, the nsIContentPermissionRequest is
+   * cancelled automatically.
+   *
+   * @param {nsIContentPermissionRequest} request
+   *        The request that we're to show a prompt for.
+   */
+  prompt(request) {
+    try {
+      // Only allow exactly one permission request here.
+      let types = request.types.QueryInterface(Ci.nsIArray);
+      if (types.length != 1) {
+        throw Components.Exception(
+          "Expected an nsIContentPermissionRequest with only 1 type.",
+          Cr.NS_ERROR_UNEXPECTED);
+      }
+
+      let type = types.queryElementAt(0, Ci.nsIContentPermissionType).type;
+      let combinedIntegration =
+        Integration.contentPermission.getCombined(ContentPermissionIntegration);
+
+      let permissionPrompt =
+        combinedIntegration.createPermissionPrompt(type, request);
+      if (!permissionPrompt) {
+        throw Components.Exception(
+          `Failed to handle permission of type ${type}`,
+          Cr.NS_ERROR_FAILURE);
+      }
+
+      permissionPrompt.prompt();
+    } catch (ex) {
+      Cu.reportError(ex);
+      request.cancel();
+      throw ex;
+    }
+  },
+};
+
+var DefaultBrowserCheck = {
+  get OPTIONPOPUP() { return "defaultBrowserNotificationPopup" },
+  _setAsDefaultTimer: null,
+  _setAsDefaultButtonClickStartTime: 0,
+
+  closePrompt: function(aNode) {
+    if (this._notification) {
+      this._notification.close();
+    }
+  },
+
+  setAsDefault: function() {
+    let claimAllTypes = true;
+    let setAsDefaultError = false;
+    if (AppConstants.platform == "win") {
+      try {
+        // In Windows 8+, the UI for selecting default protocol is much
+        // nicer than the UI for setting file type associations. So we
+        // only show the protocol association screen on Windows 8+.
+        // Windows 8 is version 6.2.
+        let version = Services.sysinfo.getProperty("version");
+        claimAllTypes = (parseFloat(version) < 6.2);
+      } catch (ex) { }
+    }
+    try {
+      ShellService.setDefaultBrowser(claimAllTypes, false);
+
+      if (this._setAsDefaultTimer) {
+        this._setAsDefaultTimer.cancel();
+      }
+
+      this._setAsDefaultButtonClickStartTime = Math.floor(Date.now() / 1000);
+      this._setAsDefaultTimer = Cc["@mozilla.org/timer;1"].createInstance(Ci.nsITimer);
+      this._setAsDefaultTimer.init(() => {
+        let isDefault = false;
+        let isDefaultError = false;
+        try {
+          isDefault = ShellService.isDefaultBrowser(true, false);
+        } catch (ex) {
+          isDefaultError = true;
+        }
+
+        let now = Math.floor(Date.now() / 1000);
+        let runTime = now - this._setAsDefaultButtonClickStartTime;
+        if (isDefault || runTime > 600) {
+          this._setAsDefaultTimer.cancel();
+          this._setAsDefaultTimer = null;
+          Services.telemetry.getHistogramById("BROWSER_SET_DEFAULT_TIME_TO_COMPLETION_SECONDS")
+                            .add(runTime);
+        }
+        Services.telemetry.getHistogramById("BROWSER_IS_USER_DEFAULT_ERROR")
+                          .add(isDefaultError);
+      }, 1000, Ci.nsITimer.TYPE_REPEATING_SLACK);
+    } catch (ex) {
+      setAsDefaultError = true;
+      Cu.reportError(ex);
+    }
+    // Here BROWSER_IS_USER_DEFAULT and BROWSER_SET_USER_DEFAULT_ERROR appear
+    // to be inverse of each other, but that is only because this function is
+    // called when the browser is set as the default. During startup we record
+    // the BROWSER_IS_USER_DEFAULT value without recording BROWSER_SET_USER_DEFAULT_ERROR.
+    Services.telemetry.getHistogramById("BROWSER_IS_USER_DEFAULT")
+                      .add(!setAsDefaultError);
+    Services.telemetry.getHistogramById("BROWSER_SET_DEFAULT_ERROR")
+                      .add(setAsDefaultError);
+  },
+
+  _createPopup: function(win, notNowStrings, neverStrings) {
+    let doc = win.document;
+    let popup = doc.createElement("menupopup");
+    popup.id = this.OPTIONPOPUP;
+
+    let notNowItem = doc.createElement("menuitem");
+    notNowItem.id = "defaultBrowserNotNow";
+    notNowItem.setAttribute("label", notNowStrings.label);
+    notNowItem.setAttribute("accesskey", notNowStrings.accesskey);
+    popup.appendChild(notNowItem);
+
+    let neverItem = doc.createElement("menuitem");
+    neverItem.id = "defaultBrowserNever";
+    neverItem.setAttribute("label", neverStrings.label);
+    neverItem.setAttribute("accesskey", neverStrings.accesskey);
+    popup.appendChild(neverItem);
+
+    popup.addEventListener("command", this);
+
+    let popupset = doc.getElementById("mainPopupSet");
+    popupset.appendChild(popup);
+  },
+
+  handleEvent: function(event) {
+    if (event.type == "command") {
+      if (event.target.id == "defaultBrowserNever") {
+        ShellService.shouldCheckDefaultBrowser = false;
+      }
+      this.closePrompt();
+    }
+  },
+
+  prompt: function(win) {
+    let useNotificationBar = Services.prefs.getBoolPref("browser.defaultbrowser.notificationbar");
+
+    let brandBundle = win.document.getElementById("bundle_brand");
+    let brandShortName = brandBundle.getString("brandShortName");
+
+    let shellBundle = win.document.getElementById("bundle_shell");
+    let buttonPrefix = "setDefaultBrowser" + (useNotificationBar ? "" : "Alert");
+    let yesButton = shellBundle.getFormattedString(buttonPrefix + "Confirm.label",
+                                                   [brandShortName]);
+    let notNowButton = shellBundle.getString(buttonPrefix + "NotNow.label");
+
+    if (useNotificationBar) {
+      let promptMessage = shellBundle.getFormattedString("setDefaultBrowserMessage2",
+                                                         [brandShortName]);
+      let optionsMessage = shellBundle.getString("setDefaultBrowserOptions.label");
+      let optionsKey = shellBundle.getString("setDefaultBrowserOptions.accesskey");
+
+      let neverLabel = shellBundle.getString("setDefaultBrowserNever.label");
+      let neverKey = shellBundle.getString("setDefaultBrowserNever.accesskey");
+
+      let yesButtonKey = shellBundle.getString("setDefaultBrowserConfirm.accesskey");
+      let notNowButtonKey = shellBundle.getString("setDefaultBrowserNotNow.accesskey");
+
+      let notificationBox = win.document.getElementById("high-priority-global-notificationbox");
+
+      this._createPopup(win, {
+        label: notNowButton,
+        accesskey: notNowButtonKey
+      }, {
+        label: neverLabel,
+        accesskey: neverKey
+      });
+
+      let buttons = [
+        {
+          label: yesButton,
+          accessKey: yesButtonKey,
+          callback: () => {
+            this.setAsDefault();
+            this.closePrompt();
+          }
+        },
+        {
+          label: optionsMessage,
+          accessKey: optionsKey,
+          popup: this.OPTIONPOPUP
+        }
+      ];
+
+      let iconPixels = win.devicePixelRatio > 1 ? "32" : "16";
+      let iconURL = "chrome://branding/content/icon" + iconPixels + ".png";
+      const priority = notificationBox.PRIORITY_WARNING_HIGH;
+      let callback = this._onNotificationEvent.bind(this);
+      this._notification = notificationBox.appendNotification(promptMessage, "default-browser",
+                                                              iconURL, priority, buttons,
+                                                              callback);
+    } else {
+      // Modal prompt
+      let promptTitle = shellBundle.getString("setDefaultBrowserTitle");
+      let promptMessage = shellBundle.getFormattedString("setDefaultBrowserMessage",
+                                                         [brandShortName]);
+      let askLabel = shellBundle.getFormattedString("setDefaultBrowserDontAsk",
+                                                    [brandShortName]);
+
+      let ps = Services.prompt;
+      let shouldAsk = { value: true };
+      let buttonFlags = (ps.BUTTON_TITLE_IS_STRING * ps.BUTTON_POS_0) +
+                        (ps.BUTTON_TITLE_IS_STRING * ps.BUTTON_POS_1) +
+                        ps.BUTTON_POS_0_DEFAULT;
+      let rv = ps.confirmEx(win, promptTitle, promptMessage, buttonFlags,
+                            yesButton, notNowButton, null, askLabel, shouldAsk);
+      if (rv == 0) {
+        this.setAsDefault();
+      } else if (!shouldAsk.value) {
+        ShellService.shouldCheckDefaultBrowser = false;
+      }
+
+      try {
+        let resultEnum = rv * 2 + shouldAsk.value;
+        Services.telemetry.getHistogramById("BROWSER_SET_DEFAULT_RESULT")
+                          .add(resultEnum);
+      } catch (ex) { /* Don't break if Telemetry is acting up. */ }
+    }
+  },
+
+  _onNotificationEvent: function(eventType) {
+    if (eventType == "removed") {
+      let doc = this._notification.ownerDocument;
+      let popup = doc.getElementById(this.OPTIONPOPUP);
+      popup.removeEventListener("command", this);
+      popup.remove();
+      delete this._notification;
+    }
+  },
+};
+
+var E10SAccessibilityCheck = {
+  // tracks when an a11y init observer fires prior to the
+  // first window being opening.
+  _wantsPrompt: false,
+
+  init: function() {
+    Services.obs.addObserver(this, "a11y-init-or-shutdown", true);
+    Services.obs.addObserver(this, "quit-application-granted", true);
+  },
+
+  QueryInterface: XPCOMUtils.generateQI([Ci.nsIObserver, Ci.nsISupportsWeakReference]),
+
+  get forcedOn() {
+    try {
+      return Services.prefs.getBoolPref("browser.tabs.remote.force-enable");
+    } catch (e) {}
+    return false;
+  },
+
+  observe: function(subject, topic, data) {
+    switch (topic) {
+      case "quit-application-granted":
+        // Tag the profile with a11y load state. We use this in nsAppRunner
+        // checks on the next start.
+        Services.prefs.setBoolPref("accessibility.loadedInLastSession",
+                                   Services.appinfo.accessibilityEnabled);
+        break;
+      case "a11y-init-or-shutdown":
+        if (data == "1") {
+          // Update this so users can check this while still running
+          Services.prefs.setBoolPref("accessibility.loadedInLastSession", true);
+          this._showE10sAccessibilityWarning();
+        }
+        break;
+    }
+  },
+
+  onWindowsRestored: function() {
+    if (this._wantsPrompt) {
+      this._wantsPrompt = false;
+      this._showE10sAccessibilityWarning();
+    }
+  },
+
+  _warnedAboutAccessibility: false,
+
+  _showE10sAccessibilityWarning: function() {
+    // We don't prompt about a11y incompat if e10s is off.
+    if (!Services.appinfo.browserTabsRemoteAutostart) {
+      return;
+    }
+
+    // If the user set the forced pref and it's true, ignore a11y init.
+    // If the pref doesn't exist or if it's false, prompt.
+    if (this.forcedOn) {
+      return;
+    }
+
+    // Only prompt once per session
+    if (this._warnedAboutAccessibility) {
+      return;
+    }
+    this._warnedAboutAccessibility = true;
+
+    let win = RecentWindow.getMostRecentBrowserWindow();
+    if (!win || !win.gBrowser || !win.gBrowser.selectedBrowser) {
+      Services.console.logStringMessage(
+          "Accessibility support is partially disabled due to compatibility issues with new features.");
+      this._wantsPrompt = true;
+      this._warnedAboutAccessibility = false;
+      return;
+    }
+    let browser = win.gBrowser.selectedBrowser;
+
+    // We disable a11y for content and prompt on the chrome side letting
+    // a11y users know they need to disable e10s and restart.
+    let promptMessage = win.gNavigatorBundle.getFormattedString(
+                          "e10s.accessibilityNotice.mainMessage2",
+                          [gBrandBundle.GetStringFromName("brandShortName")]
+                        );
+    let notification;
+    let restartCallback  = function() {
+      let cancelQuit = Cc["@mozilla.org/supports-PRBool;1"].createInstance(Ci.nsISupportsPRBool);
+      Services.obs.notifyObservers(cancelQuit, "quit-application-requested", "restart");
+      if (cancelQuit.data) {
+        return; // somebody canceled our quit request
+      }
+      // Restart the browser
+      Services.startup.quit(Services.startup.eAttemptQuit | Services.startup.eRestart);
+    };
+    // main option: an Ok button, keeps running with content accessibility disabled
+    let mainAction = {
+      label: win.gNavigatorBundle.getString("e10s.accessibilityNotice.acceptButton.label"),
+      accessKey: win.gNavigatorBundle.getString("e10s.accessibilityNotice.acceptButton.accesskey"),
+      callback: function () {
+        // If the user invoked the button option remove the notification,
+        // otherwise keep the alert icon around in the address bar.
+        notification.remove();
+      },
+      dismiss: true
+    };
+    // secondary option: a restart now button. When we restart e10s will be disabled due to
+    // accessibility having been loaded in the previous session.
+    let secondaryActions = [{
+      label: win.gNavigatorBundle.getString("e10s.accessibilityNotice.enableAndRestart.label"),
+      accessKey: win.gNavigatorBundle.getString("e10s.accessibilityNotice.enableAndRestart.accesskey"),
+      callback: restartCallback,
+    }];
+    let options = {
+      popupIconURL: "chrome://browser/skin/e10s-64@2x.png",
+      learnMoreURL: Services.urlFormatter.formatURLPref("app.support.e10sAccessibilityUrl"),
+      persistWhileVisible: true,
+      hideNotNow: true,
+    };
+
+    notification =
+      win.PopupNotifications.show(browser, "a11y_enabled_with_e10s",
+                                  promptMessage, null, mainAction,
+                                  secondaryActions, options);
+  },
+};
+
+var components = [BrowserGlue, ContentPermissionPrompt];
+this.NSGetFactory = XPCOMUtils.generateNSGetFactory(components);
+
+
+// Listen for UITour messages.
+// Do it here instead of the UITour module itself so that the UITour module is lazy loaded
+// when the first message is received.
+var globalMM = Cc["@mozilla.org/globalmessagemanager;1"].getService(Ci.nsIMessageListenerManager);
+globalMM.addMessageListener("UITour:onPageEvent", function(aMessage) {
+  UITour.onPageEvent(aMessage, aMessage.data);
+});