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

@-moz-document domain("nicovideo.jp") {
  .thumb_img:hover,
  a:focus .thumb_img {
    position: relative;
    /* 80 x 60 */
    width: 130px!important;
    height: 100px !important;
    margin: -20px 0 -20px -50px;
  }
  .search_thumb_img:hover,
  a:focus .search_thumb_img {
    position: relative;
    /* 80 x 60 */
    width: 130px!important;
    height: 100px !important;
    margin: -40px -25px 0;
  }
  .thumb_img_M:hover,
  a:focus .thumb_img_M {
    position: relative;
    /* 96 x 72 */
    width: 130px!important;
    height: 100px !important;
    margin: -14px 0 -14px -34px;
  }
  .thumb_img_S:hover,
  a:focus .thumb_img_S {
    position: relative;
    /* 48 x 36 */
    width: 130px!important;
    height: 100px !important;
    margin: -32px -37px -32px -41px!important;
  }
  .thumb_img[width="94"]:hover,
  a:focus .thumb_img[width="94"] {
    /* 94 x 70 */
    margin: -15px -18px;
  }
  .thumb_img[width="46"]:hover,
  a:focus .thumb_img[width="46"] {
    /* 46 x 34 */
    margin: -33px 0 -33px -84px;
  }
}