<!--
     Any copyright is dedicated to the Public Domain.
     http://creativecommons.org/licenses/publicdomain/
     Ensure that SVG elements using fill="url(#...)" are *not*
     affected by mozSetImageElement.
-->
<!DOCTYPE html>
<html>
<body style="margin:0">
  <svg width="300" height="300">
    <rect width="300" height="300" fill="url(#g)"></rect>
    <linearGradient id="red" gradientUnits="objectBoundingBox" x2="0" y2="1">
      <stop stop-color="red" offset="0"></stop>
      <stop stop-color="black" offset="1"></stop>
    </linearGradient>
    <linearGradient id="g" gradientUnits="objectBoundingBox" x2="0" y2="1">
      <stop stop-color="lime" offset="0"></stop>
      <stop stop-color="black" offset="1"></stop>
    </linearGradient>
  </svg>
  <script>document.mozSetImageElement("g", document.getElementById("red"));</script>
</body>
</html>