diff -r 000000000000 -r 6474c204b198 browser/base/content/test/general/browser_bug581242.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/base/content/test/general/browser_bug581242.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,21 @@
+/* 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/. */
+
+function test() {
+  // Create a new tab and load about:addons
+  let blanktab = gBrowser.addTab();
+  gBrowser.selectedTab = blanktab;
+  BrowserOpenAddonsMgr();
+
+  is(blanktab, gBrowser.selectedTab, "Current tab should be blank tab");
+  // Verify that about:addons loads
+  waitForExplicitFinish();
+  gBrowser.selectedBrowser.addEventListener("load", function() {
+    gBrowser.selectedBrowser.removeEventListener("load", arguments.callee, true);
+    let browser = blanktab.linkedBrowser;
+    is(browser.currentURI.spec, "about:addons", "about:addons should load into blank tab.");
+    gBrowser.removeTab(blanktab);
+    finish();
+  }, true);
+}