diff -r 000000000000 -r 6474c204b198 mobile/android/components/XPIDialogService.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mobile/android/components/XPIDialogService.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,39 @@
+/* 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 Cu = Components.utils;
+
+Cu.import("resource://gre/modules/XPCOMUtils.jsm");
+Cu.import("resource://gre/modules/Services.jsm");
+
+// -----------------------------------------------------------------------
+// Web Install Prompt service
+// -----------------------------------------------------------------------
+
+function WebInstallPrompt() { }
+
+WebInstallPrompt.prototype = {
+  classID: Components.ID("{c1242012-27d8-477e-a0f1-0b098ffc329b}"),
+  QueryInterface: XPCOMUtils.generateQI([Ci.amIWebInstallPrompt]),
+
+  confirm: function(aWindow, aURL, aInstalls) {
+    let bundle = Services.strings.createBundle("chrome://browser/locale/browser.properties");
+
+    let prompt = Services.prompt;
+    let flags = prompt.BUTTON_POS_0 * prompt.BUTTON_TITLE_IS_STRING + prompt.BUTTON_POS_1 * prompt.BUTTON_TITLE_CANCEL;
+    let title = bundle.GetStringFromName("addonsConfirmInstall.title");
+    let button = bundle.GetStringFromName("addonsConfirmInstall.install");
+
+    aInstalls.forEach(function(install) {
+      let result = (prompt.confirmEx(aWindow, title, install.name, flags, button, null, null, null, {value: false}) == 0);
+      if (result)
+        install.install();
+      else
+        install.cancel();
+    });
+  }
+};
+
+this.NSGetFactory = XPCOMUtils.generateNSGetFactory([WebInstallPrompt]);