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

@-moz-document url-prefix("http://www.nicovideo.jp/watch/") {
  .info_frm {
    width: 700px;
    position: absolute;
    z-index: 10;
    height: 10px;
    margin-top: -30px !important;
    overflow: hidden;
  }
  .info_frm:hover {
    height: auto;
    overflow: auto;
    -moz-box-shadow: 2px 2px 5px gray;
    box-shadow: 2px 2px 5px gray;
  }
  #itab {
    margin-bottom: 30px !important;
  }
}