<!--
     Any copyright is dedicated to the Public Domain.
     http://creativecommons.org/publicdomain/zero/1.0/
-->
<svg xmlns="http://www.w3.org/2000/svg">

  <title>Reference for filter result property</title>

  <!-- From https://bugzilla.mozilla.org/show_bug.cgi?id=935902 -->

  <defs>
    <filter id="f1">
      <feGaussianBlur id="gb" in="SourceGraphic" stdDeviation="4" result="blur"/>
      <feColorMatrix values="1 0 0 0 0  0 0.333 0 0 0  0 0 1 0 0  0 0 0 1 0" in="blur"/>
    </filter>
  </defs>
  <circle cx="100" cy="50" r="50" fill="yellow" filter="url('#f1')"/>
</svg>