diff -r 000000000000 -r 6474c204b198 browser/base/content/test/general/browser_utilityOverlay.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/base/content/test/general/browser_utilityOverlay.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,62 @@
+/* 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/. */
+
+const gTests = [
+  test_getTopWin,
+  test_getBoolPref,
+  test_openNewTabWith,
+  test_openUILink
+];
+
+function test () {
+  waitForExplicitFinish();
+  executeSoon(runNextTest);
+}
+
+function runNextTest() {
+  if (gTests.length) {
+    let testFun = gTests.shift();
+    info("Running " + testFun.name);
+    testFun()
+  }
+  else {
+    finish();
+  }
+}
+
+function test_getTopWin() {
+  is(getTopWin(), window, "got top window");
+  runNextTest();
+}
+
+
+function test_getBoolPref() {
+  is(getBoolPref("browser.search.openintab", false), false, "getBoolPref");
+  is(getBoolPref("this.pref.doesnt.exist", true), true, "getBoolPref fallback");
+  is(getBoolPref("this.pref.doesnt.exist", false), false, "getBoolPref fallback #2");
+  runNextTest();
+}
+
+function test_openNewTabWith() {
+  openNewTabWith("http://example.com/");
+  let tab = gBrowser.selectedTab = gBrowser.tabs[1];
+  tab.linkedBrowser.addEventListener("load", function onLoad(event) {
+    tab.linkedBrowser.removeEventListener("load", onLoad, true);
+    is(tab.linkedBrowser.currentURI.spec, "http://example.com/", "example.com loaded");
+    gBrowser.removeCurrentTab();
+    runNextTest();
+  }, true);
+}
+
+function test_openUILink() {
+  let tab = gBrowser.selectedTab = gBrowser.addTab("about:blank");
+  tab.linkedBrowser.addEventListener("load", function onLoad(event) {
+    tab.linkedBrowser.removeEventListener("load", onLoad, true);
+    is(tab.linkedBrowser.currentURI.spec, "http://example.org/", "example.org loaded");
+    gBrowser.removeCurrentTab();
+    runNextTest();
+  }, true);
+
+  openUILink("http://example.org/"); // defaults to "current"
+}