The Tor Browser / file revision

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      http://creativecommons.org/publicdomain/zero/1.0/

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 <svg xmlns="http://www.w3.org/2000/svg" version="1.1" class="reftest-wait">

   <title>Test that the area that's covered by a filtered element is invalidated when content inside it changes</title>

   <filter id="f" x="0" y="0" width="100%" height="100">

     <feGaussianBlur in="SourceGraphic" stdDeviation="0.1"/>

   </filter>

   <script type="text/javascript">//<![CDATA[

 function doTest()

 {

   var e = document.getElementsByTagName("rect")[0];

   e.style.fill = "lime";

   document.documentElement.removeAttribute('class');

 }

 document.addEventListener("MozReftestInvalidate", doTest, false);

   //]]></script>

   <g filter="url(#f)">

     <rect x="0" y="0" width="100" height="100" style="fill: red;"/>

   </g>

 </svg>