<!DOCTYPE html>
<html>
<head>
<style>
.box {
width: 150px;
height: 150px;
}
#parent {
background-color: rgb(255,0,0);
}
</style>
</head>
<body>
<!-- You should a green square with no red -->
<div id="parent" class="box">
<embed class="box" type="application/x-webkit-test-webplugin" background-color="green" opacity="1.0">
</div>
</body>
</html>