The Tor Browser / file revision

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 xmlns="http://www.w3.org/2000/svg" xmlns:html="http://www.w3.org/1999/xhtml" onload="setTimeout(boom, 30);" class="reftest-wait"><html:script>

 function boom()

 {

   var defs = document.getElementById("defs");

   var gb = document.getElementById("Gaussian_Blur");

   defs.parentNode.removeChild(defs);

   gb.removeChild(gb.firstChild); // remove a whitespace text node (!)

   document.documentElement.removeAttribute("class");

 }

 </html:script>

 <defs id="defs">

 <filter id="Gaussian_Blur">

 <feGaussianBlur in="SourceGraphic" stdDeviation="3"/>

 </filter>

 </defs>

 <ellipse cx="200" cy="150" rx="70" ry="40"

 style="fill:#ff0000;stroke:#000000;

 stroke-width:2;filter:url(#Gaussian_Blur)"/>

 </svg>