@namespace url(http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul);
/*center items*/
.bookmarks-toolbar-items>.scrollbox-innerbox{-moz-box-pack:center!important}
/*hide label (ff3)*/
#personal-bookmarks toolbarbutton[image]>label,
/*hide label (ff2)*/
#bookmarks-ptf>toolbarbutton[image]:not([image=""])>label,
/*hide default favicon (ff3)*/
#personal-bookmarks toolbarbutton:not([image])>image,
/*hide default favicon by Chad-) (ff2)*/
#bookmarks-ptf>toolbarbutton[image=""]>image
{display:none!important}