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

#PersonalToolbar .bookmark-item > .toolbarbutton-text-stack, 
#PersonalToolbar .bookmark-item > .toolbarbutton-text {
display: none !important;
}
#PersonalToolbar .bookmark-item {
margin-left: 1px !important;
margin-right: 1px !important;
padding-left: 0 !important;
padding-right: 0 !important;
}