@namespace url(http://www.w3.org/1999/xhtml);

@-moz-document domain("youtube.com") {

/* Positions comment scores to the far right */
span.watch-comment-score {
  position: relative !important;
  left: 4em !important;
}
/* Positions thumbs to the left a bit */
div[class*=watch-comment-voting] button {
  position: relative !important;
  right: 2.2em !important;
}
/* Makes thumbs invisible (except the grayed-out ones) */
div.watch-comment-voting button[class*=hover] {
  -moz-opacity: 0 !important;
}
/* Makes thumbs visible when hovered */
div.watch-comment-voting button[class*=hover]:hover {
  -moz-opacity: 1 !important;
}
/* Makes Reply|Spam links invisible */
div.watch-comment-action {
  -moz-opacity: 0 !important;
}
/* Makes Reply|Spam links visible when hovered */
div.watch-comment-action:hover {
  -moz-opacity: 1 !important;
}
/* Makes all scores of zero invisible */
span.watch-comment-gray {
  visibility: hidden !important;
}
}