@namespace url(http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul);
#urlbar > .autocomplete-history-dropmarker {
  display: inherit !important;
  margin-right: -4px !important;
}

#urlbar > .autocomplete-history-dropmarker:hover {
  margin-left: 0px !important;
  display: inherit !important;
  margin-right: -4px !important;
  border: none !important;
  -moz-appearance: none !important;
  background: none !important;
}

 #urlbar >  .autocomplete-history-dropmarker[open="true"] {
  display: inherit !important;
  margin-left: 0px !important;
  border: none !important;
  -moz-appearance: none !important;
  background: none !important;
}