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Test Info:

<html>
<head>
<script>
function go () {
try { o1 = document.getElementById('x') } catch(e) { }
try { o1.src = '=' } catch(e) { }
try { o2 = document.cloneNode(false) } catch(e) { }
try { o3 = new XMLHttpRequest({mozAnon: true}) } catch(e) { }
try { o3.open('GET', 1, false) } catch(e) { }
try { o3.send() } catch(e) { }
try { o2.prepend('', o1, '', o2) } catch(e) { }
}
document.addEventListener('DOMContentLoaded', go)
</script>
</head>
<body>
<picture>
<img id='x' src='data:image/png;base64,R0lGODlhAQABAAD/ACH/C05FVFNDQVBFMi4wAwEAAAAsAAAAAEAAQAAAgA'/>
</body>
</html>