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https://bugzilla.mozilla.org/show_bug.cgi?id=1037687
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  <meta charset="utf-8">
  <title>Test for Bug 1037687</title>
  <script src="/tests/SimpleTest/SimpleTest.js"></script>
  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
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<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1037687">Mozilla Bug 1037687</a>
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<script type="application/javascript">
  /** Test for Bug 1037687 **/
  SimpleTest.waitForExplicitFinish();
  window.onload = function() {
    // This test loads in an iframe, to ensure that the element instance is
    // loaded with the correct value of the preference.
    let iframe = document.createElement("iframe");
    iframe.src = "test_bug1037687_subframe.html";
    document.body.appendChild(iframe);
  };
</script>
</body>
</html>
