diff -r 000000000000 -r 6474c204b198 browser/metro/base/content/helperui/AlertsHelper.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/metro/base/content/helperui/AlertsHelper.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,45 @@
+/* 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/. */
+
+var AlertsHelper = {
+  _listener: null,
+
+  showAlertNotification: function ah_show(aImageURL, aTitle, aText, aTextClickable, aCookie, aListener) {
+    if (aListener) {
+      Services.obs.addObserver(this, "metro_native_toast_clicked", false);
+      Services.obs.addObserver(this, "metro_native_toast_dismissed", false);
+      Services.obs.addObserver(this, "metro_native_toast_shown", false);
+    }
+    this._listener = aListener;
+
+    if (Services.metro.foreground) {
+      // Firefox is in the foreground, no need for a notification.
+      return;
+    }
+    Services.metro.showNativeToast(aTitle, aText, aImageURL, aCookie);
+  },
+
+  closeAlert: function ah_close() {
+    if (this._listener) {
+      Services.obs.removeObserver(this, "metro_native_toast_shown");
+      Services.obs.removeObserver(this, "metro_native_toast_clicked");
+      Services.obs.removeObserver(this, "metro_native_toast_dismissed");
+      this._listener = null;
+    }
+  },
+
+  observe: function(aSubject, aTopic, aData) {
+    switch (aTopic) {
+      case "metro_native_toast_clicked":
+        this._listener.observe(null, "alertclickcallback", aData);
+        break;
+      case "metro_native_toast_shown":
+        this._listener.observe(null, "alertshow", aData);
+        break;
+      case "metro_native_toast_dismissed":
+        this._listener.observe(null, "alertfinished", aData);
+        break;
+    }
+  }
+};