<!DOCTYPE html>
<html>
<head>
    <style>
        body {
            margin: 0;
        }
        embed {
            width: 300px;
            height: 300px;
            visibility: hidden;
        }
    </style>
</head>
<body>
    <embed type="application/x-webkit-test-netscape" test="dump-window-rect"></embed>
</body>
</html>