mozilla-release/layout/reftests/forms/input/range/moz-range-progress-3-ref.html

<!DOCTYPE html>
<html>
  <head>
    <title>Test ::-moz-range-progress</title>
    <style>

input[type=range] {
  width: 200px;
  height: 20px;
  margin: 0;
  padding: 0;
  background-color: blue;
}

input[type=range]::-moz-range-track {
  border: 0;
  height: 10px;
  background-color: lime;
}

input[type=range]::-moz-range-thumb {
  width: 10px;
  height: 10px;
  border: 0;
  border-radius: 0;
  background-image: none;
  background-color: yellow;
}

    </style>
  </head>
  <body>
    <input type=range value=100>
  </body>
</html>