<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>pseudo double SetInitialChildlist</title>
<style>
.cat::-moz-table-row-group { overflow: scroll;}
tr { position: absolute;}
</style>
</head>
<body>
<table class="cat">
<tr>
<td>Cell</td>
</tr>
</table>
</body>
</html>