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Test Info:
<!DOCTYPE HTML>
<body style="margin:0">
<div style="margin:100px; width:100px; height:100px; filter:opacity(1);">
<div style="position:absolute; left:50px; top:50px; width:200px; height:200px; background:lime;"></div>
<div style="position:fixed; left:80px; top:80px; width:200px; height:200px; background:yellow;"></div>
</div>