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Test Info:

<!DOCTYPE html>
<link rel="author" title="Mats Palmgren" href="mailto:mats@mozilla.com">
<link rel="help" href="https://www.w3.org/TR/css-break-3/">
<link rel="match" href="about:blank">
<meta name="flags" content="paged">
<style>
@page {
size: 5in 3in;
margin: 0.5in;
}
html,body {
color:black; background-color:white; font:20px/1 monospace; padding:0; margin:0;
}
body {
width: 100vw;
height: 100vh;
outline: 100px solid red;
box-shadow: 100px 100px 0 #F00;
}
</style>
<body></body>