message: mozilla progress styling
diff: .progress {
  appearance: none;
  width: 100%;
  + height: 8px;
  + border-radius: 10px;
  + background-color: #E8E8E8;
  }
  .progress::-webkit-progress-bar {
  .progress::-webkit-progress-value {
  border-radius: 4px;
  + background-color: #159B41;
  +}
  +
  +.progress.has-error::-webkit-progress-value {
  + background-color: #A62C26;
  +}
  +
  +.progress::-moz-progress-bar {
  + height: 8px;
  + border-radius: 4px;
  + background-color: #159B41;
  +}
  +
  +.progress.has-error::-moz-progress-bar {
  background-color: #A62C26;
  }
  