Move WebExtensions enabled Add-ons Manager

1 files changed, 663 insertions, 0 deletions

diff --git a/toolkit/mozapps/webextensions/content/update.js b/toolkit/mozapps/webextensions/content/update.js
new file mode 100644
index 000000000..80d0fa688
--- /dev/null
+++ b/toolkit/mozapps/webextensions/content/update.js
@@ -0,0 +1,663 @@
+// -*- indent-tabs-mode: nil; js-indent-level: 2 -*-
+
+/* 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/. */
+
+// This UI is only opened from the Extension Manager when the app is upgraded.
+
+"use strict";
+
+const PREF_UPDATE_EXTENSIONS_ENABLED            = "extensions.update.enabled";
+const PREF_XPINSTALL_ENABLED                    = "xpinstall.enabled";
+
+// timeout (in milliseconds) to wait for response to the metadata ping
+const METADATA_TIMEOUT    = 30000;
+
+Components.utils.import("resource://gre/modules/XPCOMUtils.jsm");
+XPCOMUtils.defineLazyModuleGetter(this, "AddonManager", "resource://gre/modules/AddonManager.jsm");
+XPCOMUtils.defineLazyModuleGetter(this, "AddonManagerPrivate", "resource://gre/modules/AddonManager.jsm");
+XPCOMUtils.defineLazyModuleGetter(this, "Services", "resource://gre/modules/Services.jsm");
+XPCOMUtils.defineLazyModuleGetter(this, "AddonRepository", "resource://gre/modules/addons/AddonRepository.jsm");
+XPCOMUtils.defineLazyModuleGetter(this, "Task", "resource://gre/modules/Task.jsm");
+XPCOMUtils.defineLazyModuleGetter(this, "Promise", "resource://gre/modules/Promise.jsm");
+XPCOMUtils.defineLazyModuleGetter(this, "Log", "resource://gre/modules/Log.jsm");
+var logger = null;
+
+var gUpdateWizard = {
+  // When synchronizing app compatibility info this contains all installed
+  // add-ons. When checking for compatible versions this contains only
+  // incompatible add-ons.
+  addons: [],
+  // Contains a Set of IDs for add-on that were disabled by the application update.
+  affectedAddonIDs: null,
+  // The add-ons that we found updates available for
+  addonsToUpdate: [],
+  shouldSuggestAutoChecking: false,
+  shouldAutoCheck: false,
+  xpinstallEnabled: true,
+  xpinstallLocked: false,
+  // cached AddonInstall entries for add-ons we might want to update,
+  // keyed by add-on ID
+  addonInstalls: new Map(),
+  shuttingDown: false,
+  // Count the add-ons disabled by this update, enabled/disabled by
+  // metadata checks, and upgraded.
+  disabled: 0,
+  metadataEnabled: 0,
+  metadataDisabled: 0,
+  upgraded: 0,
+  upgradeFailed: 0,
+  upgradeDeclined: 0,
+
+  init: function()
+  {
+    logger = Log.repository.getLogger("addons.update-dialog");
+    // XXX could we pass the addons themselves rather than the IDs?
+    this.affectedAddonIDs = new Set(window.arguments[0]);
+
+    try {
+      this.shouldSuggestAutoChecking =
+        !Services.prefs.getBoolPref(PREF_UPDATE_EXTENSIONS_ENABLED);
+    }
+    catch (e) {
+    }
+
+    try {
+      this.xpinstallEnabled = Services.prefs.getBoolPref(PREF_XPINSTALL_ENABLED);
+      this.xpinstallLocked = Services.prefs.prefIsLocked(PREF_XPINSTALL_ENABLED);
+    }
+    catch (e) {
+    }
+
+    if (Services.io.offline)
+      document.documentElement.currentPage = document.getElementById("offline");
+    else
+      document.documentElement.currentPage = document.getElementById("versioninfo");
+  },
+
+  onWizardFinish: function gUpdateWizard_onWizardFinish ()
+  {
+    if (this.shouldSuggestAutoChecking)
+      Services.prefs.setBoolPref(PREF_UPDATE_EXTENSIONS_ENABLED, this.shouldAutoCheck);
+  },
+
+  _setUpButton: function(aButtonID, aButtonKey, aDisabled)
+  {
+    var strings = document.getElementById("updateStrings");
+    var button = document.documentElement.getButton(aButtonID);
+    if (aButtonKey) {
+      button.label = strings.getString(aButtonKey);
+      try {
+        button.setAttribute("accesskey", strings.getString(aButtonKey + "Accesskey"));
+      }
+      catch (e) {
+      }
+    }
+    button.disabled = aDisabled;
+  },
+
+  setButtonLabels: function(aBackButton, aBackButtonIsDisabled,
+                             aNextButton, aNextButtonIsDisabled,
+                             aCancelButton, aCancelButtonIsDisabled)
+  {
+    this._setUpButton("back", aBackButton, aBackButtonIsDisabled);
+    this._setUpButton("next", aNextButton, aNextButtonIsDisabled);
+    this._setUpButton("cancel", aCancelButton, aCancelButtonIsDisabled);
+  },
+
+  // Update Errors
+  errorItems: [],
+
+  checkForErrors: function(aElementIDToShow)
+  {
+    if (this.errorItems.length > 0)
+      document.getElementById(aElementIDToShow).hidden = false;
+  },
+
+  onWizardClose: function(aEvent)
+  {
+    return this.onWizardCancel();
+  },
+
+  onWizardCancel: function()
+  {
+    gUpdateWizard.shuttingDown = true;
+    // Allow add-ons to continue downloading and installing
+    // in the background, though some may require a later restart
+    // Pages that are waiting for user input go into the background
+    // on cancel
+    if (gMismatchPage.waiting) {
+      logger.info("Dialog closed in mismatch page");
+      if (gUpdateWizard.addonInstalls.size > 0) {
+        gInstallingPage.startInstalls(
+          Array.from(gUpdateWizard.addonInstalls.values()));
+      }
+      return true;
+    }
+
+    // Pages that do asynchronous things will just keep running and check
+    // gUpdateWizard.shuttingDown to trigger background behaviour
+    if (!gInstallingPage.installing) {
+      logger.info("Dialog closed while waiting for updated compatibility information");
+    }
+    else {
+      logger.info("Dialog closed while downloading and installing updates");
+    }
+    return true;
+  }
+};
+
+var gOfflinePage = {
+  onPageAdvanced: function()
+  {
+    Services.io.offline = false;
+    return true;
+  },
+
+  toggleOffline: function()
+  {
+    var nextbtn = document.documentElement.getButton("next");
+    nextbtn.disabled = !nextbtn.disabled;
+  }
+}
+
+// Addon listener to count addons enabled/disabled by metadata checks
+var listener = {
+  onDisabled: function(aAddon) {
+    gUpdateWizard.affectedAddonIDs.add(aAddon.id);
+    gUpdateWizard.metadataDisabled++;
+  },
+  onEnabled: function(aAddon) {
+    gUpdateWizard.affectedAddonIDs.delete(aAddon.id);
+    gUpdateWizard.metadataEnabled++;
+  }
+};
+
+var gVersionInfoPage = {
+  _completeCount: 0,
+  _totalCount: 0,
+  _versionInfoDone: false,
+  onPageShow: Task.async(function*() {
+    gUpdateWizard.setButtonLabels(null, true,
+                                  "nextButtonText", true,
+                                  "cancelButtonText", false);
+
+    gUpdateWizard.disabled = gUpdateWizard.affectedAddonIDs.size;
+
+    // Ensure compatibility overrides are up to date before checking for
+    // individual addon updates.
+    AddonManager.addAddonListener(listener);
+    if (AddonRepository.isMetadataStale()) {
+      // Do the metadata ping, listening for any newly enabled/disabled add-ons.
+      yield AddonRepository.repopulateCache(METADATA_TIMEOUT);
+      if (gUpdateWizard.shuttingDown) {
+        logger.debug("repopulateCache completed after dialog closed");
+      }
+    }
+    // Fetch the add-ons that are still affected by this update,
+    // excluding the hotfix add-on.
+    let idlist = Array.from(gUpdateWizard.affectedAddonIDs).filter(
+      a => a.id != AddonManager.hotfixID);
+    if (idlist.length < 1) {
+      gVersionInfoPage.onAllUpdatesFinished();
+      return;
+    }
+
+    logger.debug("Fetching affected addons " + idlist.toSource());
+    let fetchedAddons = yield new Promise((resolve, reject) =>
+      AddonManager.getAddonsByIDs(idlist, resolve));
+    // We shouldn't get nulls here, but let's be paranoid...
+    gUpdateWizard.addons = fetchedAddons.filter(a => a);
+    if (gUpdateWizard.addons.length < 1) {
+      gVersionInfoPage.onAllUpdatesFinished();
+      return;
+    }
+
+    gVersionInfoPage._totalCount = gUpdateWizard.addons.length;
+
+    for (let addon of gUpdateWizard.addons) {
+      logger.debug("VersionInfo Finding updates for ${id}", addon);
+      addon.findUpdates(gVersionInfoPage, AddonManager.UPDATE_WHEN_NEW_APP_INSTALLED);
+    }
+  }),
+
+  onAllUpdatesFinished: function() {
+    AddonManager.removeAddonListener(listener);
+    AddonManagerPrivate.recordSimpleMeasure("appUpdate_disabled",
+        gUpdateWizard.disabled);
+    AddonManagerPrivate.recordSimpleMeasure("appUpdate_metadata_enabled",
+        gUpdateWizard.metadataEnabled);
+    AddonManagerPrivate.recordSimpleMeasure("appUpdate_metadata_disabled",
+        gUpdateWizard.metadataDisabled);
+    // Record 0 for these here in case we exit early; values will be replaced
+    // later if we actually upgrade any.
+    AddonManagerPrivate.recordSimpleMeasure("appUpdate_upgraded", 0);
+    AddonManagerPrivate.recordSimpleMeasure("appUpdate_upgradeFailed", 0);
+    AddonManagerPrivate.recordSimpleMeasure("appUpdate_upgradeDeclined", 0);
+    // Filter out any add-ons that are now enabled.
+    let addonList = gUpdateWizard.addons.map(a => a.id + ":" + a.appDisabled);
+    logger.debug("VersionInfo updates finished: found " + addonList.toSource());
+    let filteredAddons = [];
+    for (let a of gUpdateWizard.addons) {
+      if (a.appDisabled) {
+        logger.debug("Continuing with add-on " + a.id);
+        filteredAddons.push(a);
+      }
+      else if (gUpdateWizard.addonInstalls.has(a.id)) {
+        gUpdateWizard.addonInstalls.get(a.id).cancel();
+        gUpdateWizard.addonInstalls.delete(a.id);
+      }
+    }
+    gUpdateWizard.addons = filteredAddons;
+
+    if (gUpdateWizard.shuttingDown) {
+      // jump directly to updating auto-update add-ons in the background
+      if (gUpdateWizard.addonInstalls.size > 0) {
+        let installs = Array.from(gUpdateWizard.addonInstalls.values());
+        gInstallingPage.startInstalls(installs);
+      }
+      return;
+    }
+
+    if (filteredAddons.length > 0) {
+      if (!gUpdateWizard.xpinstallEnabled && gUpdateWizard.xpinstallLocked) {
+        document.documentElement.currentPage = document.getElementById("adminDisabled");
+        return;
+      }
+      document.documentElement.currentPage = document.getElementById("mismatch");
+    }
+    else {
+      logger.info("VersionInfo: No updates require further action");
+      // VersionInfo compatibility updates resolved all compatibility problems,
+      // close this window and continue starting the application...
+      // XXX Bug 314754 - We need to use setTimeout to close the window due to
+      // the EM using xmlHttpRequest when checking for updates.
+      setTimeout(close, 0);
+    }
+  },
+
+  // UpdateListener
+  onUpdateFinished: function(aAddon, status) {
+    ++this._completeCount;
+
+    if (status != AddonManager.UPDATE_STATUS_NO_ERROR) {
+      logger.debug("VersionInfo update " + this._completeCount + " of " + this._totalCount +
+           " failed for " + aAddon.id + ": " + status);
+      gUpdateWizard.errorItems.push(aAddon);
+    }
+    else {
+      logger.debug("VersionInfo update " + this._completeCount + " of " + this._totalCount +
+           " finished for " + aAddon.id);
+    }
+
+    // If we're not in the background, just make a list of add-ons that have
+    // updates available
+    if (!gUpdateWizard.shuttingDown) {
+      // If we're still in the update check window and the add-on is now active
+      // then it won't have been disabled by startup
+      if (aAddon.active) {
+        AddonManagerPrivate.removeStartupChange(AddonManager.STARTUP_CHANGE_DISABLED, aAddon.id);
+        gUpdateWizard.metadataEnabled++;
+      }
+
+      // Update the status text and progress bar
+      var updateStrings = document.getElementById("updateStrings");
+      var statusElt = document.getElementById("versioninfo.status");
+      var statusString = updateStrings.getFormattedString("statusPrefix", [aAddon.name]);
+      statusElt.setAttribute("value", statusString);
+
+      // Update the status text and progress bar
+      var progress = document.getElementById("versioninfo.progress");
+      progress.mode = "normal";
+      progress.value = Math.ceil((this._completeCount / this._totalCount) * 100);
+    }
+
+    if (this._completeCount == this._totalCount)
+      this.onAllUpdatesFinished();
+  },
+
+  onUpdateAvailable: function(aAddon, aInstall) {
+    logger.debug("VersionInfo got an install for " + aAddon.id + ": " + aAddon.version);
+    gUpdateWizard.addonInstalls.set(aAddon.id, aInstall);
+  },
+};
+
+var gMismatchPage = {
+  waiting: false,
+
+  onPageShow: function()
+  {
+    gMismatchPage.waiting = true;
+    gUpdateWizard.setButtonLabels(null, true,
+                                  "mismatchCheckNow", false,
+                                  "mismatchDontCheck", false);
+    document.documentElement.getButton("next").focus();
+
+    var incompatible = document.getElementById("mismatch.incompatible");
+    for (let addon of gUpdateWizard.addons) {
+      var listitem = document.createElement("listitem");
+      listitem.setAttribute("label", addon.name + " " + addon.version);
+      incompatible.appendChild(listitem);
+    }
+  }
+};
+
+var gUpdatePage = {
+  _totalCount: 0,
+  _completeCount: 0,
+  onPageShow: function()
+  {
+    gMismatchPage.waiting = false;
+    gUpdateWizard.setButtonLabels(null, true,
+                                  "nextButtonText", true,
+                                  "cancelButtonText", false);
+    document.documentElement.getButton("next").focus();
+
+    gUpdateWizard.errorItems = [];
+
+    this._totalCount = gUpdateWizard.addons.length;
+    for (let addon of gUpdateWizard.addons) {
+      logger.debug("UpdatePage requesting update for " + addon.id);
+      // Redundant call to find updates again here when we already got them
+      // in the VersionInfo page: https://bugzilla.mozilla.org/show_bug.cgi?id=960597
+      addon.findUpdates(this, AddonManager.UPDATE_WHEN_NEW_APP_INSTALLED);
+    }
+  },
+
+  onAllUpdatesFinished: function() {
+    if (gUpdateWizard.shuttingDown)
+      return;
+
+    var nextPage = document.getElementById("noupdates");
+    if (gUpdateWizard.addonsToUpdate.length > 0)
+      nextPage = document.getElementById("found");
+    document.documentElement.currentPage = nextPage;
+  },
+
+  // UpdateListener
+  onUpdateAvailable: function(aAddon, aInstall) {
+    logger.debug("UpdatePage got an update for " + aAddon.id + ": " + aAddon.version);
+    gUpdateWizard.addonsToUpdate.push(aInstall);
+  },
+
+  onUpdateFinished: function(aAddon, status) {
+    if (status != AddonManager.UPDATE_STATUS_NO_ERROR)
+      gUpdateWizard.errorItems.push(aAddon);
+
+    ++this._completeCount;
+
+    if (!gUpdateWizard.shuttingDown) {
+      // Update the status text and progress bar
+      var updateStrings = document.getElementById("updateStrings");
+      var statusElt = document.getElementById("checking.status");
+      var statusString = updateStrings.getFormattedString("statusPrefix", [aAddon.name]);
+      statusElt.setAttribute("value", statusString);
+
+      var progress = document.getElementById("checking.progress");
+      progress.value = Math.ceil((this._completeCount / this._totalCount) * 100);
+    }
+
+    if (this._completeCount == this._totalCount)
+      this.onAllUpdatesFinished()
+  },
+};
+
+var gFoundPage = {
+  onPageShow: function()
+  {
+    gUpdateWizard.setButtonLabels(null, true,
+                                  "installButtonText", false,
+                                  null, false);
+
+    var foundUpdates = document.getElementById("found.updates");
+    var itemCount = gUpdateWizard.addonsToUpdate.length;
+    for (let install of gUpdateWizard.addonsToUpdate) {
+      let listItem = foundUpdates.appendItem(install.name + " " + install.version);
+      listItem.setAttribute("type", "checkbox");
+      listItem.setAttribute("checked", "true");
+      listItem.install = install;
+    }
+
+    if (!gUpdateWizard.xpinstallEnabled) {
+      document.getElementById("xpinstallDisabledAlert").hidden = false;
+      document.getElementById("enableXPInstall").focus();
+      document.documentElement.getButton("next").disabled = true;
+    }
+    else {
+      document.documentElement.getButton("next").focus();
+      document.documentElement.getButton("next").disabled = false;
+    }
+  },
+
+  toggleXPInstallEnable: function(aEvent)
+  {
+    var enabled = aEvent.target.checked;
+    gUpdateWizard.xpinstallEnabled = enabled;
+    var pref = Components.classes["@mozilla.org/preferences-service;1"]
+                         .getService(Components.interfaces.nsIPrefBranch);
+    pref.setBoolPref(PREF_XPINSTALL_ENABLED, enabled);
+    this.updateNextButton();
+  },
+
+  updateNextButton: function()
+  {
+    if (!gUpdateWizard.xpinstallEnabled) {
+      document.documentElement.getButton("next").disabled = true;
+      return;
+    }
+
+    var oneChecked = false;
+    var foundUpdates = document.getElementById("found.updates");
+    var updates = foundUpdates.getElementsByTagName("listitem");
+    for (let update of updates) {
+      if (!update.checked)
+        continue;
+      oneChecked = true;
+      break;
+    }
+
+    gUpdateWizard.setButtonLabels(null, true,
+                                  "installButtonText", true,
+                                  null, false);
+    document.getElementById("found").setAttribute("next", "installing");
+    document.documentElement.getButton("next").disabled = !oneChecked;
+  }
+};
+
+var gInstallingPage = {
+  _installs         : [],
+  _errors           : [],
+  _strings          : null,
+  _currentInstall   : -1,
+  _installing       : false,
+
+  // Initialize fields we need for installing and tracking progress,
+  // and start iterating through the installations
+  startInstalls: function(aInstallList) {
+    if (!gUpdateWizard.xpinstallEnabled) {
+      return;
+    }
+
+    let installs = Array.from(aInstallList).map(a => a.existingAddon.id);
+    logger.debug("Start installs for " + installs.toSource());
+    this._errors = [];
+    this._installs = aInstallList;
+    this._installing = true;
+    this.startNextInstall();
+  },
+
+  onPageShow: function()
+  {
+    gUpdateWizard.setButtonLabels(null, true,
+                                  "nextButtonText", true,
+                                  null, true);
+
+    var foundUpdates = document.getElementById("found.updates");
+    var updates = foundUpdates.getElementsByTagName("listitem");
+    let toInstall = [];
+    for (let update of updates) {
+      if (!update.checked) {
+        logger.info("User chose to cancel update of " + update.label);
+        gUpdateWizard.upgradeDeclined++;
+        update.install.cancel();
+        continue;
+      }
+      toInstall.push(update.install);
+    }
+    this._strings = document.getElementById("updateStrings");
+
+    this.startInstalls(toInstall);
+  },
+
+  startNextInstall: function() {
+    if (this._currentInstall >= 0) {
+      this._installs[this._currentInstall].removeListener(this);
+    }
+
+    this._currentInstall++;
+
+    if (this._installs.length == this._currentInstall) {
+      Services.obs.notifyObservers(null, "TEST:all-updates-done", null);
+      AddonManagerPrivate.recordSimpleMeasure("appUpdate_upgraded",
+          gUpdateWizard.upgraded);
+      AddonManagerPrivate.recordSimpleMeasure("appUpdate_upgradeFailed",
+          gUpdateWizard.upgradeFailed);
+      AddonManagerPrivate.recordSimpleMeasure("appUpdate_upgradeDeclined",
+          gUpdateWizard.upgradeDeclined);
+      this._installing = false;
+      if (gUpdateWizard.shuttingDown) {
+        return;
+      }
+      var nextPage = this._errors.length > 0 ? "installerrors" : "finished";
+      document.getElementById("installing").setAttribute("next", nextPage);
+      document.documentElement.advance();
+      return;
+    }
+
+    let install = this._installs[this._currentInstall];
+
+    if (gUpdateWizard.shuttingDown && !AddonManager.shouldAutoUpdate(install.existingAddon)) {
+      logger.debug("Don't update " + install.existingAddon.id + " in background");
+      gUpdateWizard.upgradeDeclined++;
+      install.cancel();
+      this.startNextInstall();
+      return;
+    }
+    install.addListener(this);
+    install.install();
+  },
+
+  // InstallListener
+  onDownloadStarted: function(aInstall) {
+    if (gUpdateWizard.shuttingDown) {
+      return;
+    }
+    var strings = document.getElementById("updateStrings");
+    var label = strings.getFormattedString("downloadingPrefix", [aInstall.name]);
+    var actionItem = document.getElementById("actionItem");
+    actionItem.value = label;
+  },
+
+  onDownloadProgress: function(aInstall) {
+    if (gUpdateWizard.shuttingDown) {
+      return;
+    }
+    var downloadProgress = document.getElementById("downloadProgress");
+    downloadProgress.value = Math.ceil(100 * aInstall.progress / aInstall.maxProgress);
+  },
+
+  onDownloadEnded: function(aInstall) {
+  },
+
+  onDownloadFailed: function(aInstall) {
+    this._errors.push(aInstall);
+
+    gUpdateWizard.upgradeFailed++;
+    this.startNextInstall();
+  },
+
+  onInstallStarted: function(aInstall) {
+    if (gUpdateWizard.shuttingDown) {
+      return;
+    }
+    var strings = document.getElementById("updateStrings");
+    var label = strings.getFormattedString("installingPrefix", [aInstall.name]);
+    var actionItem = document.getElementById("actionItem");
+    actionItem.value = label;
+  },
+
+  onInstallEnded: function(aInstall, aAddon) {
+    if (!gUpdateWizard.shuttingDown) {
+      // Remember that this add-on was updated during startup
+      AddonManagerPrivate.addStartupChange(AddonManager.STARTUP_CHANGE_CHANGED,
+                                           aAddon.id);
+    }
+
+    gUpdateWizard.upgraded++;
+    this.startNextInstall();
+  },
+
+  onInstallFailed: function(aInstall) {
+    this._errors.push(aInstall);
+
+    gUpdateWizard.upgradeFailed++;
+    this.startNextInstall();
+  }
+};
+
+var gInstallErrorsPage = {
+  onPageShow: function()
+  {
+    gUpdateWizard.setButtonLabels(null, true, null, true, null, true);
+    document.documentElement.getButton("finish").focus();
+  },
+};
+
+// Displayed when there are incompatible add-ons and the xpinstall.enabled
+// pref is false and locked.
+var gAdminDisabledPage = {
+  onPageShow: function()
+  {
+    gUpdateWizard.setButtonLabels(null, true, null, true,
+                                  "cancelButtonText", true);
+    document.documentElement.getButton("finish").focus();
+  }
+};
+
+// Displayed when selected add-on updates have been installed without error.
+// There can still be add-ons that are not compatible and don't have an update.
+var gFinishedPage = {
+  onPageShow: function()
+  {
+    gUpdateWizard.setButtonLabels(null, true, null, true, null, true);
+    document.documentElement.getButton("finish").focus();
+
+    if (gUpdateWizard.shouldSuggestAutoChecking) {
+      document.getElementById("finishedCheckDisabled").hidden = false;
+      gUpdateWizard.shouldAutoCheck = true;
+    }
+    else
+      document.getElementById("finishedCheckEnabled").hidden = false;
+
+    document.documentElement.getButton("finish").focus();
+  }
+};
+
+// Displayed when there are incompatible add-ons and there are no available
+// updates.
+var gNoUpdatesPage = {
+  onPageShow: function(aEvent)
+  {
+    gUpdateWizard.setButtonLabels(null, true, null, true, null, true);
+    if (gUpdateWizard.shouldSuggestAutoChecking) {
+      document.getElementById("noupdatesCheckDisabled").hidden = false;
+      gUpdateWizard.shouldAutoCheck = true;
+    }
+    else
+      document.getElementById("noupdatesCheckEnabled").hidden = false;
+
+    gUpdateWizard.checkForErrors("updateCheckErrorNotFound");
+    document.documentElement.getButton("finish").focus();
+  }
+};