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

toolbarbutton:not([class*="tabs-alltabs-button"]) dropmarker {display: none !important;}
toolbarbutton:not([type="menu"]):hover dropmarker {display: -moz-box !important;}
toolbarbutton[type="menu"]:not([class*="bookmark-item"]) image {margin: 0px !important;}