@namespace url(http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul);
toolbar[mode="icons"] #back-forward-dropmarker {
  -moz-appearance: none !important;
  -moz-margin-start: -3px !important;
  -moz-margin-end: -5px !important;}

toolbar[iconsize="small"][mode="icons"] #back-button > .toolbarbutton-icon {
  -moz-appearance: none !important;
  -moz-margin-start: -7px !important;
  -moz-margin-end: -5px !important;}

toolbar[iconsize="small"][mode="icons"] #forward-button > .toolbarbutton-icon {
  -moz-appearance: none !important;
  -moz-margin-start: -3px !important;
  -moz-margin-end: -5px !important;}

/* hide disabled back/forward/dropmarker */
#back-button[disabled="true"] {display: none;}
#forward-button[disabled="true"] {display: none;}
#back-forward-dropmarker[disabled="true"] {display: none;}