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<svg xmlns="http://www.w3.org/2000/svg" width="200" height="200"> | |
<title>Reference for alpha mask</title> | |
<!-- From https://bugzilla.mozilla.org/show_bug.cgi?id=793617 --> | |
<rect x="10" y="10" width="80" height="80" fill="blue" fill-opacity="0.5"/> | |
</svg> |