diff -r 000000000000 -r 6474c204b198 addon-sdk/source/lib/sdk/tabs/tab.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/addon-sdk/source/lib/sdk/tabs/tab.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,19 @@
+/* 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/. */
+'use strict';
+
+module.metadata = {
+  'stability': 'unstable',
+  'engines': {
+    'Firefox': '*',
+    'Fennec': '*'
+  }
+};
+
+if (require('../system/xul-app').name == 'Fennec') {
+  module.exports = require('./tab-fennec');
+}
+else {
+  module.exports = require('./tab-firefox');
+}