bookmarks toolbar remove favicon - firefox 72

to remove favicon on bookmarks toolbar in firefox 72,
in userChrome.css, add this,
(folder is shown as dropdown arrow)

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

#personal-bookmarks .bookmark-item .toolbarbutton-icon {
 display:none!important;
}
#personal-bookmarks .bookmark-item[container] .toolbarbutton-menu-dropmarker {
 display: -moz-box !important;
}