userContent.css

/* Note that for every change, Firefox needs to be restarted. */

/* Replace font with another. Due to some terrible font matching done in
 * Firefox, it does not use the correct serif fallback font. So instead force
 * some to use my fallback explicitly.
 */
/*
@font-face {
  font-family: 'Liberation Serif';
  src: local('Charis SIL');
}
@font-face {
  font-family: Georgia;
  src: local('Charis SIL');
}
 */

/* Dark theme screws up input/textarea colours because of lazy webprogrammers */
/* Disabled unless necessary since it breaks checkboxes in more recent Firefox
input {
  -moz-appearance: none !important;
  background-color: white;
  color: black;
}

textarea {
  -moz-appearance: none !important;
  background-color: white;
  color: black;
}
*/

@-moz-document domain(ycombinator.com) {
  div.comment {
    width: 30em;
  }
}

@-moz-document domain(reddit.com) {
  div.Comment {
    max-width: 30em !important;
}
}