The current userChrome.css (3)

/* No "New Tab button" abomination */
.tabs-newtab-button {display: none;}

toolbarbutton.bookmark-item {
  height: 0px !important;
  /* font-size: small !important; */
  margin-top: -3px !important;
  color: black !important;
}

/* Changes the color of only the Menu entry */
/* http://ubuntuforums.org/showthread.php?t=503508 */
menubar, menu {
  color: black !important;
}

/* change font color of popup menus */
menupopup > menu,
menupopup > menuitem,
popup > menu,
popup > menuitem {
  color: white !important;
}

/* Remove the Bookmark star, I use Ctrl-D instead */
#star-button {
display: none !important;
}

/* Remove splitter between the URL and Search bars to save space */
#urlbar-search-splitter {
display: none !important;
}

/* hide toolbar borders */
menubar, toolbox, toolbar {
  border-style: none !important;
}

/* hide toolbar borders */
toolbar {
  -moz-appearance: none !important;
} 

/* Remove the Help menu entry */
/* http://wiki.eeeuser.com/howto:shrinkfirefox */
menu[label="Help"] {
  display: none !important
}