diff -r 000000000000 -r 6474c204b198 layout/tools/reftest/bootstrap.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/layout/tools/reftest/bootstrap.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,73 @@
+Components.utils.import("resource://gre/modules/FileUtils.jsm");        
+
+function loadIntoWindow(window) {}
+function unloadFromWindow(window) {}
+
+function setDefaultPrefs() {
+    // This code sets the preferences for extension-based reftest.
+    var prefs = Components.classes["@mozilla.org/preferences-service;1"].
+                getService(Components.interfaces.nsIPrefService);
+    var branch = prefs.getDefaultBranch("");
+
+#include reftest-preferences.js
+}
+
+var windowListener = {
+    onOpenWindow: function(aWindow) {
+        let domWindow = aWindow.QueryInterface(Components.interfaces.nsIInterfaceRequestor).getInterface(Components.interfaces.nsIDOMWindowInternal || Components.interfaces.nsIDOMWindow);
+        domWindow.addEventListener("load", function() {
+            domWindow.removeEventListener("load", arguments.callee, false);
+
+            let wm = Components.classes["@mozilla.org/appshell/window-mediator;1"].getService(Components.interfaces.nsIWindowMediator);
+
+            // Load into any existing windows
+            let enumerator = wm.getEnumerator("navigator:browser");
+            while (enumerator.hasMoreElements()) {
+                let win = enumerator.getNext().QueryInterface(Components.interfaces.nsIDOMWindow);
+                setDefaultPrefs();
+                Components.utils.import("chrome://reftest/content/reftest.jsm");
+                win.addEventListener("pageshow", function() {
+                    win.removeEventListener("pageshow", arguments.callee); 
+                    // We add a setTimeout here because windows.innerWidth/Height are not set yet;
+                    win.setTimeout(function () {OnRefTestLoad(win);}, 0);
+                });
+                break;
+            }
+        }, false);
+   },
+   onCloseWindow: function(aWindow){ },
+   onWindowTitleChange: function(){ },
+};
+
+function startup(aData, aReason) {
+    let wm = Components.classes["@mozilla.org/appshell/window-mediator;1"].
+             getService (Components.interfaces.nsIWindowMediator);
+
+    Components.manager.addBootstrappedManifestLocation(aData.installPath);
+
+    // Load into any new windows
+    wm.addListener(windowListener);
+}
+
+function shutdown(aData, aReason) {
+    // When the application is shutting down we normally don't have to clean up any UI changes
+    if (aReason == APP_SHUTDOWN)
+        return;
+
+    let wm = Components.classes["@mozilla.org/appshell/window-mediator;1"].
+             getService(Components.interfaces.nsIWindowMediator);
+
+    // Stop watching for new windows
+    wm.removeListener(windowListener);
+
+    // Unload from any existing windows
+    let enumerator = wm.getEnumerator("navigator:browser");
+    while (enumerator.hasMoreElements()) {
+        let win = enumerator.getNext().QueryInterface(Components.interfaces.nsIDOMWindow);
+        unloadFromWindow(win);
+    }
+}
+
+function install(aData, aReason) { }
+function uninstall(aData, aReason) { }
+