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diff --git a/addon-sdk/source/test/windows/test-firefox-windows.js b/addon-sdk/source/test/windows/test-firefox-windows.js
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+++ b/addon-sdk/source/test/windows/test-firefox-windows.js
@@ -0,0 +1,621 @@
+/* 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 { Cc, Ci } = require('chrome');
+const { setTimeout } = require('sdk/timers');
+const { Loader } = require('sdk/test/loader');
+const { onFocus, getMostRecentWindow, windows, isBrowser, getWindowTitle, isFocused } = require('sdk/window/utils');
+const { open, close, focus, promise: windowPromise } = require('sdk/window/helpers');
+const { browserWindows } = require("sdk/windows");
+const tabs = require("sdk/tabs");
+const winUtils = require("sdk/deprecated/window-utils");
+const { isPrivate } = require('sdk/private-browsing');
+const { isWindowPBSupported } = require('sdk/private-browsing/utils');
+const { viewFor } = require("sdk/view/core");
+const { defer } = require("sdk/lang/functional");
+const { cleanUI } = require("sdk/test/utils");
+const { after } = require("sdk/test/utils");
+const { merge } = require("sdk/util/object");
+const self = require("sdk/self");
+const { openTab } = require("../tabs/utils");
+const { set: setPref, reset: resetPref } = require("sdk/preferences/service");
+const OPEN_IN_NEW_WINDOW_PREF = 'browser.link.open_newwindow';
+const DISABLE_POPUP_PREF = 'dom.disable_open_during_load';
+const { wait } = require('../event/helpers');
+
+// TEST: open & close window
+exports.testOpenAndCloseWindow = function(assert, done) {
+  assert.equal(browserWindows.length, 1, "Only one window open");
+  let title = 'testOpenAndCloseWindow';
+
+  browserWindows.open({
+    url: "data:text/html;charset=utf-8,<title>" + title + "</title>",
+    onOpen: function(window) {
+      assert.equal(this, browserWindows, "The 'this' object is the windows object.");
+      assert.equal(window.tabs.length, 1, "Only one tab open");
+      assert.equal(browserWindows.length, 2, "Two windows open");
+
+      window.tabs.activeTab.once('ready', function onReady(tab) {
+        assert.pass(RegExp(title).test(window.title), "URL correctly loaded");
+        window.close();
+      });
+    },
+    onClose: function(window) {
+      assert.equal(window.tabs.length, 0, "Tabs were cleared");
+      assert.equal(browserWindows.length, 1, "Only one window open");
+      done();
+    }
+  });
+};
+
+exports.testNeWindowIsFocused = function(assert, done) {
+  let mainWindow = browserWindows.activeWindow;
+
+  browserWindows.open({
+    url: "about:blank",
+    onOpen: function(window) {
+      focus(viewFor(window)).then((window) => {
+        assert.ok(isFocused(window), 'the new window is focused');
+        assert.ok(isFocused(browserWindows.activeWindow), 'the active window is focused');
+        assert.ok(!isFocused(mainWindow), 'the main window is not focused');
+        done();
+      })
+    }
+  });
+}
+
+exports.testOpenRelativePathWindow = function*(assert) {
+  assert.equal(browserWindows.length, 1, "Only one window open");
+
+  let loader = Loader(module, null, null, {
+    modules: {
+      "sdk/self": merge({}, self, {
+        data: merge({}, self.data, require("./../fixtures"))
+      })
+    }
+  });
+  assert.pass("Created a new loader");
+
+  let tabReady = new Promise(resolve => {
+    loader.require("sdk/tabs").on("ready", (tab) => {
+      if (!/test\.html$/.test(tab.url))
+        return;
+      assert.equal(tab.title, "foo",
+        "tab opened a document with relative path");
+      resolve();
+    });
+  });
+
+
+  yield new Promise(resolve => {
+    loader.require("sdk/windows").browserWindows.open({
+      url: "./test.html",
+      onOpen: (window) => {
+        assert.pass("Created a new window");
+        resolve();
+      }
+    })
+  });
+
+  yield tabReady;
+  loader.unload();
+}
+
+exports.testAutomaticDestroy = function(assert, done) {
+  let windows = browserWindows;
+
+  // Create a second windows instance that we will unload
+  let called = false;
+  let loader = Loader(module);
+  let windows2 = loader.require("sdk/windows").browserWindows;
+
+  windows2.on("open", function() {
+    called = true;
+  });
+
+  loader.unload();
+
+  // Fire a windows event and check that this unloaded instance is inactive
+  windows.open({
+    url: "data:text/html;charset=utf-8,foo",
+    onOpen: function(window) {
+      setTimeout(function () {
+        assert.ok(!called, "Unloaded windows instance is destroyed and inactive");
+        done();
+      });
+    }
+  });
+};
+
+exports.testWindowTabsObject = function(assert, done) {
+  let window, count = 0;
+  function runTest() {
+    if (++count != 2)
+      return;
+
+    assert.equal(window.tabs.length, 1, "Only 1 tab open");
+    assert.equal(window.tabs.activeTab.title, "tab 1", "Correct active tab");
+
+    window.tabs.open({
+      url: "data:text/html;charset=utf-8,<title>tab 2</title>",
+      inBackground: true,
+      onReady: function onReady(newTab) {
+        assert.equal(window.tabs.length, 2, "New tab open");
+        assert.equal(newTab.title, "tab 2", "Correct new tab title");
+        assert.equal(window.tabs.activeTab.title, "tab 1", "Correct active tab");
+
+        let i = 1;
+        for (let tab of window.tabs)
+          assert.equal(tab.title, "tab " + i++, "Correct title");
+
+        window.close();
+      }
+    });
+  }
+
+  tabs.once("ready", runTest);
+
+  browserWindows.open({
+    url: "data:text/html;charset=utf-8,<title>tab 1</title>",
+    onActivate: function onActivate(win) {
+      window = win;
+      runTest();
+    },
+    onClose: function onClose(window) {
+      assert.equal(window.tabs.length, 0, "No more tabs on closed window");
+      done();
+    }
+  });
+};
+
+exports.testOnOpenOnCloseListeners = function(assert, done) {
+  let windows = browserWindows;
+
+  assert.equal(browserWindows.length, 1, "Only one window open");
+
+  let received = {
+    listener1: false,
+    listener2: false,
+    listener3: false,
+    listener4: false
+  }
+
+  function listener1() {
+    assert.equal(this, windows, "The 'this' object is the windows object.");
+
+    if (received.listener1)
+      assert.fail("Event received twice");
+    received.listener1 = true;
+  }
+
+  function listener2() {
+    if (received.listener2)
+      assert.fail("Event received twice");
+    received.listener2 = true;
+  }
+
+  function listener3() {
+    assert.equal(this, windows, "The 'this' object is the windows object.");
+    if (received.listener3)
+      assert.fail("Event received twice");
+    received.listener3 = true;
+  }
+
+  function listener4() {
+    if (received.listener4)
+      assert.fail("Event received twice");
+    received.listener4 = true;
+  }
+
+  windows.on('open', listener1);
+  windows.on('open', listener2);
+  windows.on('close', listener3);
+  windows.on('close', listener4);
+
+  windows.open({
+    url: "data:text/html;charset=utf-8,foo",
+    onOpen: function(window) {
+      window.close(function() {
+        assert.ok(received.listener1, "onOpen handler called");
+        assert.ok(received.listener2, "onOpen handler called");
+        assert.ok(received.listener3, "onClose handler called");
+        assert.ok(received.listener4, "onClose handler called");
+
+        windows.removeListener('open', listener1);
+        windows.removeListener('open', listener2);
+        windows.removeListener('close', listener3);
+        windows.removeListener('close', listener4);
+
+        done();
+      });
+    }
+  });
+};
+
+exports.testActiveWindow = function*(assert) {
+  let windows = browserWindows;
+  let window = getMostRecentWindow();
+
+  // Raw window objects
+  let rawWindow2 =  yield windowPromise(window.OpenBrowserWindow(), "load").then(focus);
+  assert.pass("Window 2 was created");
+
+  // open a tab in window 2
+  yield openTab(rawWindow2, "data:text/html;charset=utf-8,<title>window 2</title>");
+
+  assert.equal(rawWindow2.content.document.title, "window 2", "Got correct raw window 2");
+  assert.equal(rawWindow2.document.title, windows[1].title, "Saw correct title on window 2");
+
+  let rawWindow3 =  yield windowPromise(window.OpenBrowserWindow(), "load").then(focus);;
+  assert.pass("Window 3 was created");
+
+  // open a tab in window 3
+  yield openTab(rawWindow3, "data:text/html;charset=utf-8,<title>window 3</title>");
+
+  assert.equal(rawWindow3.content.document.title, "window 3", "Got correct raw window 3");
+  assert.equal(rawWindow3.document.title, windows[2].title, "Saw correct title on window 3");
+
+  assert.equal(windows.length, 3, "Correct number of browser windows");
+
+  let count = 0;
+  for (let window in windows) {
+    count++;
+  }
+  assert.equal(count, 3, "Correct number of windows returned by iterator");
+  assert.equal(windows.activeWindow.title, windows[2].title, "Correct active window title - 3");
+  let window3 = windows[2];
+
+  yield focus(rawWindow2);
+
+  assert.equal(windows.activeWindow.title, windows[1].title, "Correct active window title - 2");
+  let window2 = windows[1];
+
+  yield new Promise(resolve => {
+    onFocus(rawWindow2).then(resolve);
+    window2.activate();
+    assert.pass("activating window2");
+  });
+
+  assert.equal(windows.activeWindow.title, windows[1].title, "Correct active window - 2");
+
+  yield new Promise(resolve => {
+    onFocus(rawWindow3).then(resolve);
+    window3.activate();
+    assert.pass("activating window3");
+  });
+
+  assert.equal(windows.activeWindow.title, window3.title, "Correct active window - 3");
+
+  yield close(rawWindow2);
+  yield close(rawWindow3);
+
+  assert.equal(windows.length, 1, "Correct number of browser windows");
+  assert.equal(window.closed, false, "Original window is still open");
+};
+
+exports.testTrackWindows = function(assert, done) {
+  let windows = [];
+  let actions = [];
+
+  let expects = [
+    "activate 0", "global activate 0", "deactivate 0", "global deactivate 0",
+    "activate 1", "global activate 1", "deactivate 1", "global deactivate 1",
+    "activate 2", "global activate 2"
+  ];
+
+  function windowsActivation(window) {
+    let index = windows.indexOf(window);
+    // only concerned with windows opened for this test
+    if (index < 0)
+      return;
+
+    assert.equal(actions.join(), expects.slice(0, index*4 + 1).join(), expects[index*4 + 1]);
+    actions.push("global activate " + index)
+  }
+
+  function windowsDeactivation(window) {
+    let index = windows.indexOf(window);
+    // only concerned with windows opened for this test
+    if (index < 0)
+      return;
+
+    assert.equal(actions.join(), expects.slice(0, index*4 + 3).join(), expects[index*4 + 3]);
+    actions.push("global deactivate " + index)
+  }
+
+  // listen to global activate events
+  browserWindows.on("activate", windowsActivation);
+
+  // listen to global deactivate events
+  browserWindows.on("deactivate", windowsDeactivation);
+
+  function openWindow() {
+    windows.push(browserWindows.open({
+      url: "data:text/html;charset=utf-8,<i>testTrackWindows</i>",
+      onActivate: function(window) {
+        let index = windows.indexOf(window);
+
+        // Guard against windows that have already been removed.
+        // See bug 874502 comment 32.
+        if (index == -1)
+          return;
+
+        assert.equal(actions.join(),
+                     expects.slice(0, index*4).join(),
+                     "expecting " + expects[index*4]);
+        actions.push("activate " + index);
+
+        if (windows.length < 3) {
+          openWindow()
+        }
+        else {
+          (function closeWindows(windows) {
+            if (!windows.length) {
+              assert.pass('the last window was closed');
+              browserWindows.removeListener("activate", windowsActivation);
+              browserWindows.removeListener("deactivate", windowsDeactivation);
+              assert.pass('removed listeners');
+              return done();
+            }
+
+            return windows.pop().close(function() {
+              assert.pass('window was closed');
+              closeWindows(windows);
+            });
+          })(windows)
+        }
+      },
+      onDeactivate: function(window) {
+        let index = windows.indexOf(window);
+
+        // Guard against windows that have already been removed.
+        // See bug 874502 comment 32.
+        if (index == -1)
+          return;
+
+        assert.equal(actions.join(),
+                     expects.slice(0, index*4 + 2).join(),
+                     "expecting " + expects[index*4 + 2]);
+        actions.push("deactivate " + index)
+      }
+    }));
+  }
+  openWindow();
+}
+
+// test that it is not possible to open a private window by default
+exports.testWindowOpenPrivateDefault = function*(assert) {
+  const TITLE = "yo";
+  const URL = "data:text/html,<title>" + TITLE + "</title>";
+
+  let tabReady = new Promise(resolve => {
+    tabs.on('ready', function onTabReady(tab) {
+      if (tab.url != URL)
+        return;
+
+      tabs.removeListener('ready', onTabReady);
+      assert.equal(tab.title, TITLE, 'opened correct tab');
+      assert.equal(isPrivate(tab), false, 'tab is not private');
+      resolve();
+    });
+  })
+
+  yield new Promise(resolve => browserWindows.open({
+    url: URL,
+    isPrivate: true,
+    onOpen: function(window) {
+      assert.pass("the new window was opened");
+      resolve();
+    }
+  }));
+
+  yield tabReady;
+}
+
+// test that it is not possible to find a private window in
+// windows module's iterator
+exports.testWindowIteratorPrivateDefault = function*(assert) {
+  assert.equal(browserWindows.length, 1, 'only one window open');
+
+  let window = yield open('chrome://browser/content/browser.xul', {
+    features: {
+      private: true,
+      chrome: true
+    }
+  });
+
+  yield focus(window);
+
+  // test that there is a private window opened
+  assert.equal(isPrivate(window), true, 'there is a private window open');
+  assert.strictEqual(window, winUtils.activeWindow);
+  assert.strictEqual(window, getMostRecentWindow());
+
+  assert.ok(!isPrivate(browserWindows.activeWindow));
+
+  assert.equal(browserWindows.length, 1, 'only one window in browserWindows');
+  assert.equal(windows().length, 1, 'only one window in windows()');
+
+  assert.equal(windows(null, { includePrivate: true }).length, 2);
+
+  // test that all windows in iterator are not private
+  for (let window of browserWindows) {
+    assert.ok(!isPrivate(window), 'no window in browserWindows is private');
+  }
+};
+
+exports["test getView(window)"] = function(assert, done) {
+  browserWindows.once("open", window => {
+    const view = viewFor(window);
+
+    assert.ok(view instanceof Ci.nsIDOMWindow, "view is a window");
+    assert.ok(isBrowser(view), "view is a browser window");
+    assert.equal(getWindowTitle(view), window.title,
+                 "window has a right title");
+
+    window.close();
+    // Defer handler cause window is destroyed after event is dispatched.
+    browserWindows.once("close", defer(_ => {
+      assert.equal(viewFor(window), null, "window view is gone");
+      done();
+    }));
+  });
+
+  browserWindows.open({ url: "data:text/html,<title>yo</title>" });
+};
+
+// Tests that the this property is correct in event listeners called from
+// the windows API.
+exports.testWindowEventBindings = function(assert, done) {
+  let loader = Loader(module);
+  let { browserWindows } = loader.require("sdk/windows");
+  let firstWindow = browserWindows.activeWindow;
+  let { viewFor } = loader.require("sdk/view/core");
+
+  let EVENTS = ["open", "close", "activate", "deactivate"];
+
+  let windowBoundEventHandler = (event) => function(window) {
+    // Close event listeners are always bound to browserWindows.
+    if (event == "close")
+      assert.equal(this, browserWindows, "window listener for " + event + " event should be bound to the browserWindows object.");
+    else
+      assert.equal(this, window, "window listener for " + event + " event should be bound to the window object.");
+  };
+
+  let windowsBoundEventHandler = (event) => function(window) {
+    assert.equal(this, browserWindows, "windows listener for " + event + " event should be bound to the browserWindows object.");
+  }
+  for (let event of EVENTS)
+    browserWindows.on(event, windowsBoundEventHandler(event));
+
+  let windowsOpenEventHandler = (event) => function(window) {
+    // Open and close event listeners are always bound to browserWindows.
+    if (event == "open" || event == "close")
+      assert.equal(this, browserWindows, "windows open listener for " + event + " event should be bound to the browserWindows object.");
+    else
+      assert.equal(this, window, "windows open listener for " + event + " event should be bound to the window object.");
+  }
+
+  let openArgs = {
+    url: "data:text/html;charset=utf-8,binding-test",
+    onOpen: function(window) {
+      windowsOpenEventHandler("open").call(this, window);
+
+      for (let event of EVENTS)
+        window.on(event, windowBoundEventHandler(event));
+
+      let rawWindow = viewFor(window);
+      onFocus(rawWindow).then(() => {
+        window.once("deactivate", () => {
+          window.once("close", () => {
+            loader.unload();
+            done();
+          });
+
+          window.close();
+        });
+
+        firstWindow.activate();
+      });
+    }
+  };
+  // Listen to everything except onOpen
+  for (let event of EVENTS.slice(1)) {
+    openArgs["on" + event.slice(0, 1).toUpperCase() + event.slice(1)] = windowsOpenEventHandler(event);
+  }
+
+  browserWindows.open(openArgs);
+}
+
+// Tests that the this property is correct in event listeners called from
+// manipulating window.tabs.
+exports.testWindowTabEventBindings = function(assert, done) {
+  let loader = Loader(module);
+  let { browserWindows } = loader.require("sdk/windows");
+  let firstWindow = browserWindows.activeWindow;
+  let tabs = loader.require("sdk/tabs");
+  let windowTabs = firstWindow.tabs;
+  let firstTab = firstWindow.tabs.activeTab;
+
+  let EVENTS = ["open", "close", "activate", "deactivate",
+                "load", "ready", "pageshow"];
+
+  let tabBoundEventHandler = (event) => function(tab) {
+    assert.equal(this, tab, "tab listener for " + event + " event should be bound to the tab object.");
+  };
+
+  let windowTabsBoundEventHandler = (event) => function(tab) {
+    assert.equal(this, windowTabs, "window tabs listener for " + event + " event should be bound to the windowTabs object.");
+  }
+  for (let event of EVENTS)
+    windowTabs.on(event, windowTabsBoundEventHandler(event));
+
+  let windowTabsOpenEventHandler = (event) => function(tab) {
+    assert.equal(this, tab, "window tabs open listener for " + event + " event should be bound to the tab object.");
+  }
+
+  let openArgs = {
+    url: "data:text/html;charset=utf-8,binding-test",
+    onOpen: function(tab) {
+      windowTabsOpenEventHandler("open").call(this, tab);
+
+      for (let event of EVENTS)
+        tab.on(event, tabBoundEventHandler(event));
+
+      tab.once("pageshow", () => {
+        tab.once("deactivate", () => {
+          tab.once("close", () => {
+            loader.unload();
+            done();
+          });
+
+          tab.close();
+        });
+
+        firstTab.activate();
+      });
+    }
+  };
+  // Listen to everything except onOpen
+  for (let event of EVENTS.slice(1)) {
+    let eventProperty = "on" + event.slice(0, 1).toUpperCase() + event.slice(1);
+    openArgs[eventProperty] = windowTabsOpenEventHandler(event);
+  }
+
+  windowTabs.open(openArgs);
+}
+
+// related to bug #989288
+// https://bugzilla.mozilla.org/show_bug.cgi?id=989288
+exports["test window events after window.open"] = function*(assert, done) {
+  // ensure popups open in a new windows and disable popup blocker
+  setPref(OPEN_IN_NEW_WINDOW_PREF, 2);
+  setPref(DISABLE_POPUP_PREF, false);
+
+  // open window to trigger observers
+  tabs.activeTab.attach({
+    contentScript: "window.open('about:blank', '', " +
+                   "'width=800,height=600,resizable=no,status=no,location=no');"
+  });
+
+  let window = yield wait(browserWindows, "open");
+  assert.pass("tab open has occured");
+  window.close();
+
+  yield wait(browserWindows,"close");
+  assert.pass("tab close has occured");
+};
+
+after(exports, function*(name, assert) {
+  resetPopupPrefs();
+  yield cleanUI();
+});
+
+const resetPopupPrefs = () => {
+  resetPref(OPEN_IN_NEW_WINDOW_PREF);
+  resetPref(DISABLE_POPUP_PREF);
+};
+
+require('sdk/test').run(exports);