451170.html - mozsearch

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<html>

<head>

<script>

function doe() {

document.getElementById('a').style.display = 'table-column-group';

document.body.offsetHeight;

</script>

<style>

div::before { content:"b";}

div::after { content:"a";}

</style>

</head>

<body onload="document.body.offsetHeight; setTimeout(doe,0);">

<div style="display: table;">

  <span id="a" style="display: table-header-group; "></span>

</div>

</body>

</html>