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

span#__firefox-findbar-search-id {
  color:#fff !important;
  border:1px #900 solid !important;
  background-color:#f66 !important;
  padding-left:0.1em !important;
  padding-right:0.1em !important;
  padding-bottom:0.1em !important;
}