firefox/testing/web-platform/tests/css/css-transforms/transform-fixed-bg-ref.html

<!DOCTYPE html>
<html>
  <head>
    <title>CSS Reftest Reference</title>
    <link rel="author" title="Aryeh Gregor" href="mailto:[email protected]">
    <link rel="author" title="L. David Baron" href="https://dbaron.org/">
    <link rel="author" title="Google" href="http://www.google.com/">
    <style>
      body {
        margin: 0;
      }
      div {
        background: url(support/transform-triangle-left.svg);
        width: 100px;
        height: 100px;
        position: relative;
        left: 50px;
        top: 50px;
      }
    </style>
  </head>
  <body>
    <div></div>
  </body>
</html>