The Tor Browser / file revision

 /* 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() {

   let newTab = gBrowser.addTab("http://example.com");

   waitForExplicitFinish();

   newTab.linkedBrowser.addEventListener("load", mainPart, true);

   function mainPart() {

     newTab.linkedBrowser.removeEventListener("load", mainPart, true);

     gBrowser.pinTab(newTab);

     gBrowser.selectedTab = newTab;

     openUILinkIn("http://example.org/", "current", { inBackground: true });

     isnot(gBrowser.selectedTab, newTab, "shouldn't load in background");

     gBrowser.removeTab(newTab);

     gBrowser.removeTab(gBrowser.tabs[1]); // example.org tab

     finish();

   }

 }