/*! Alters the webextension UltraWide Video 21:9
  IMPORTANT: change the Internal UUID */
@-moz-document url-prefix("moz-extension://{75afe46a-7a50-4c6b-b866-c43a1075b071}/html/popup.html") {
  html {
    background: var(--in-content-box-background)!important;
    color: var(--in-content-page-color)!important;
    border: 3px solid!important
  }
}