@namespace url(http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul);

@-moz-document url(chrome://menuedit/content/menueditprefs.xul) {

  #intro1, #intro2, .thin {
    display: none !important;
  }

/* tighten up the button margins */
  button {
    margin: 0px !important;
    font-size: x-small !important;
  }

  #groupbox1, #groupbox2 {
    margin: 0px  !important;
    padding: 0px !important;
  }

}