The Tor Browser / file revision

 const gHttpTestRoot = getRootDirectory(gTestPath).replace("chrome://mochitests/content/", "http://127.0.0.1:8888/");

 let gTestBrowser = null;

 let gWrapperClickCount = 0;

 function test() {

   waitForExplicitFinish();

   registerCleanupFunction(function() {

     Services.prefs.clearUserPref("plugins.click_to_play");

   });

   Services.prefs.setBoolPref("plugins.click_to_play", true);

   setTestPluginEnabledState(Ci.nsIPluginTag.STATE_CLICKTOPLAY);

   gBrowser.selectedTab = gBrowser.addTab();

   gTestBrowser = gBrowser.selectedBrowser;

   gTestBrowser.addEventListener("load", pageLoad, true);

   gTestBrowser.contentWindow.location = gHttpTestRoot + "plugin_bug787619.html";

 }

 function pageLoad() {

   // Due to layout being async, "PluginBindAttached" may trigger later.

   // This forces a layout flush, thus triggering it, and schedules the

   // test so it is definitely executed afterwards.

   gTestBrowser.contentDocument.getElementById('plugin').clientTop;

   executeSoon(part1);

 }

 function part1() {

   let wrapper = gTestBrowser.contentDocument.getElementById('wrapper');

   wrapper.addEventListener('click', function() ++gWrapperClickCount, false);

   let plugin = gTestBrowser.contentDocument.getElementById('plugin');

   ok(plugin, 'got plugin element');

   ok(!plugin.activated, 'plugin should not be activated');

   ok(PopupNotifications.getNotification("click-to-play-plugins", gTestBrowser).dismissed, "Doorhanger should not be open");

   EventUtils.synthesizeMouseAtCenter(plugin, {}, gTestBrowser.contentWindow);

   let condition = function() !PopupNotifications.getNotification("click-to-play-plugins", gTestBrowser).dismissed;

   waitForCondition(condition, part2,

                    'waited too long for plugin to activate');

 }

 function part2() {

   is(gWrapperClickCount, 0, 'wrapper should not have received any clicks');

   gTestBrowser.removeEventListener("load", pageLoad, true);

   gBrowser.removeCurrentTab();

   window.focus();

   finish();

 }