div.progress-element {
  -moz-appearance: progressbar;
  display: inline-block;
  height: 1em;
  width: 10em;
  vertical-align: -0.2em;

  /* Default style in case of there is -moz-appearance: none; */
  border: 1px solid ThreeDShadow;
  border-right-color: ThreeDHighlight;
  border-bottom-color: ThreeDHighlight;
  background-color: #e6e6e6;
}

div.progress-element.vertical {
  height: 10em;
  width: 1em;
}

div.progress-bar {
  height: 100%;
  /*
   * We can't apply the following style to the reference because it will have
   * underisable effectes:
   * width: 100%;
   */

  box-sizing: border-box;

  /* Default style in case of there is -moz-appearance: none; */
  background-color: #0064b4;
}

progress, progress::-moz-progress-bar, div.progress-element, div.progress-bar {
  -moz-appearance: none;
}