dom/tests/mochitest/bugs/bug346659-opener.html


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<body onload="postBack();">
  <script>
    function postBack() {
      var s = decodeURIComponent(window.location.search.substring(1));
      window.opener.postMessage(s, "http://mochi.test:8888");
    }
    var childWin = window.open();
  </script>
</body>