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

toolbar:not([mode="text"]) #appmenu-toolbar-button > .toolbarbutton-icon,
toolbar:not([mode="text"]) #appmenu-button > .button-box .button-icon {
 margin-top: -2px !important;
 margin-bottom: -2px !important;
}