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diff --git a/tools/addon-sdk-1.4/packages/api-utils/lib/windows/loader.js b/tools/addon-sdk-1.4/packages/api-utils/lib/windows/loader.js
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+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Jetpack.
+ *
+ * The Initial Developer of the Original Code is Mozilla.
+ * Portions created by the Initial Developer are Copyright (C) 2010
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Irakli Gozalishvili <gozala@mozilla.com> (Original author)
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+"use strict";
+
+const { Cc, Ci } = require('chrome'),
+      { setTimeout } = require("../timer"),
+      { Trait } = require('../traits'),
+
+      WM = Cc['@mozilla.org/appshell/window-mediator;1'].
+        getService(Ci.nsIWindowMediator),
+
+      URI_BROWSER = 'chrome://browser/content/browser.xul',
+      NAME = '_blank',
+      FEATURES = 'chrome,all,dialog=no',
+      PARAMS = [ URI_BROWSER, NAME, FEATURES ],
+      ON_LOAD = 'load',
+      ON_UNLOAD = 'unload',
+      STATE_LOADED = 'complete',
+      BROWSER = 'navigator:browser';
+
+/**
+ * Trait provides private `_window` property and requires `_onLoad` property
+ * that will be called when `_window` is loaded. If `_window` property value
+ * is changed with already loaded window `_onLoad` still will be called.
+ */
+const WindowLoader = Trait.compose({
+  /**
+   * Internal listener that is called when window is loaded.
+   * Please keep in mind that this trait will not handle exceptions that may
+   * be thrown by this method so method itself should take care of
+   * handling them.
+   * @param {nsIWindow} window
+   */
+  _onLoad: Trait.required,
+  _tabOptions: Trait.required,
+  /**
+   * Internal listener that is called when `_window`'s DOM 'unload' event
+   * is dispatched. Please note that this trait will not handle exceptions that
+   * may be thrown by this method so method itself should take care of
+   * handling them.
+   */
+  _onUnload: Trait.required,
+  _load: function _load() {
+    if (this.__window) return;
+    let params = PARAMS.slice()
+    params.push(this._tabOptions.map(function(options) options.url).join("|"))
+    let browser =  WM.getMostRecentWindow(BROWSER);
+    this._window = browser.openDialog.apply(browser, params);
+  },
+  /**
+   * Private window who's load event is being tracked. Once window is loaded
+   * `_onLoad` is called.
+   * @type {nsIWindow}
+   */
+  get _window() this.__window,
+  set _window(window) {
+    let _window = this.__window;
+    if (!window) window = null;
+    if (window !== _window) {
+      if (_window) {
+        _window.removeEventListener(ON_UNLOAD, this.__unloadListener, false);
+        _window.removeEventListener(ON_LOAD, this.__loadListener, false);
+      }
+      if (window) {
+        window.addEventListener(
+          ON_UNLOAD,
+          this.__unloadListener ||
+            (this.__unloadListener = this._unloadListener.bind(this))
+          ,
+          false
+        );
+        this.__window = window;
+        // If window is not loaded yet setting up a listener.
+        if (STATE_LOADED != window.document.readyState) {
+          window.addEventListener(
+            ON_LOAD,
+            this.__loadListener ||
+              (this.__loadListener = this._loadListener.bind(this))
+            ,
+            false
+          );
+        }
+        else { // If window is loaded calling listener next turn of event loop.
+          this._onLoad(window)
+        }
+      }
+    }
+  },
+  __window: null,
+  /**
+   * Internal method used for listening 'load' event on the `_window`.
+   * Method takes care of removing itself from 'load' event listeners once
+   * event is being handled.
+   */
+  _loadListener: function _loadListener(event) {
+    let window = this._window;
+    if (!event.target || event.target.defaultView != window) return;
+    window.removeEventListener(ON_LOAD, this.__loadListener, false);
+    this._onLoad(window);
+  },
+  __loadListener: null,
+  /**
+   * Internal method used for listening 'unload' event on the `_window`.
+   * Method takes care of removing itself from 'unload' event listeners once
+   * event is being handled.
+   */
+  _unloadListener: function _unloadListener(event) {
+    let window = this._window;
+    if (!event.target
+      || event.target.defaultView != window
+      || STATE_LOADED != window.document.readyState
+    ) return;
+    window.removeEventListener(ON_UNLOAD, this.__unloadListener, false);
+    this._onUnload(window);
+  },
+  __unloadListener: null
+});
+exports.WindowLoader = WindowLoader;
+