diff -r 000000000000 -r 6474c204b198 addon-sdk/source/lib/sdk/window/helpers.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/addon-sdk/source/lib/sdk/window/helpers.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,63 @@
+/* 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';
+
+const { defer } = require('../core/promise');
+const events = require('../system/events');
+const { open: openWindow, onFocus, getToplevelWindow,
+        isInteractive, getOuterId } = require('./utils');
+const { Ci } = require("chrome");
+
+function open(uri, options) {
+  return promise(openWindow.apply(null, arguments), 'load');
+}
+exports.open = open;
+
+function close(window) {
+  let deferred = defer();
+  let toplevelWindow = getToplevelWindow(window);
+  let outerId = getOuterId(toplevelWindow);
+  events.on("outer-window-destroyed", function onclose({subject}) {
+    let id = subject.QueryInterface(Ci.nsISupportsPRUint64).data;
+    if (id == outerId) {
+      events.off("outer-window-destroyed", onclose);
+      deferred.resolve();
+    }
+  }, true);
+  window.close();
+  return deferred.promise;
+}
+exports.close = close;
+
+function focus(window) {
+  let p = onFocus(window);
+  window.focus();
+  return p;
+}
+exports.focus = focus;
+
+function ready(window) {
+  let { promise: result, resolve } = defer();
+
+  if (isInteractive(window))
+    resolve(window);
+  else
+    resolve(promise(window, 'DOMContentLoaded'));
+
+  return result;
+}
+exports.ready = ready;
+
+function promise(target, evt, capture) {
+  let deferred = defer();
+  capture = !!capture;
+
+  target.addEventListener(evt, function eventHandler() {
+    target.removeEventListener(evt, eventHandler, capture);
+    deferred.resolve(target);
+  }, capture);
+
+  return deferred.promise;
+}
+exports.promise = promise;