<!--
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     http://creativecommons.org/publicdomain/zero/1.0/
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<svg xmlns="http://www.w3.org/2000/svg">
  <title>Reference for feConvolveMatrix with bias</title>
  <!-- From https://bugzilla.mozilla.org/show_bug.cgi?id=527325 -->
  <rect x="0" y="0" width="100" height="100" fill="rgb(128,255,128)"/>
</svg>