732870.html - mozsearch

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<!DOCTYPE html>

<html class="reftest-wait">

<head>

<script>

function boom()

  var frameDoc = document.getElementById("f").contentDocument;

  var elem = frameDoc.documentElement;

  elem.dataset;

  document.adoptNode(elem);

  frameDoc.write("0");

  frameDoc.close();

  document.documentElement.removeAttribute("class");

</script>

</head>

<body onload="boom();">

<iframe id="f" srcdoc="<html>1</html>"></iframe>

</body>

</html>