The Tor Browser / file revision

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

      height="0" width="0">

   <script>

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

     setTimeout(doTest, 4000); // fallback for running outside reftest

     function doTest() {

       document.documentElement.removeAttribute("width");

       document.documentElement.removeAttribute("height");

       document.documentElement.removeAttribute("class");

     }

   </script>

   <rect width="100%" height="100%" fill="red"/>

   <foreignObject width="100%" height="100%">

     <div xmlns="http://www.w3.org/1999/xhtml"

          style="background:lime; width:100%; height:100%;"/>

   </foreignObject>

 </svg>