<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<script>

function boom()
{
  document.documentElement.offsetHeight;
  document.body.appendChild(document.createElement("span"));
}

</script>
</head>
<body style="max-width: -moz-min-content; white-space: pre;" onload="boom();">&#x00AD;
R</body>
</html>