@-moz-document
 url("about:buildconfig"),
 url("about:cache?device=disk"),
 url("about:cache?device=memory"),
 url("about:config"),
 url("about:plugins") {

/* Remove Border */
 * {
  border: none !important;
  }

 .contenttable {
  border: 1px solid lightgrey !important;
  }
}