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

@-moz-document domain("encrypted.google.com") {
  #nav {
    position: fixed;
    bottom: 0px;
    right: 0px;
    background-color: white;
    opacity: 0.8;
  }
}
@-moz-document domain("google.com") {
  #nav {
    position: fixed;
    bottom: 0px;
    right: 0px;
    background-color: white;
    opacity: 0.8;
  }
}
@-moz-document domain("www.google.com") {
  #nav {
    position: fixed;
    bottom: 0px;
    right: 0px;
    background-color: white;
    opacity: 0.8;
  }
}