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

@-moz-document domain(twitter.com), url-prefix(https://www.google.com/reader/), domain(facebook.com), domain(hulu.com), domain(metafilter.com), domain(news.ycombinator.com), domain(weheartit.com) {
  body {
    display: none;
  }
}