xpi/content/css/linux/bmbut_pmenu_extra.css
@namespace url(http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul);

@-moz-document url(chrome://browser/content/browser.xul) {
	
	#ctraddon_BMB_bookmarksPopup menupopup[placespopup=true] > hbox,
	#ctraddon_BMB_bookmarksPopup #ctraddon_BMB_subscribeToPageSubmenuMenupopup {
	  background: -moz-dialog !important;
	}
	#ctraddon_BMB_bookmarksPopup *:not([disabled]) label{ 
	  color: black !important;
	}
	
	#main-window[fx51plus="true"] #ctraddon_BMB_bookmarksPopup menupopup[placespopup=true] > hbox,
	#main-window[fx51plus="true"] #ctraddon_BMB_bookmarksPopup #ctraddon_BMB_subscribeToPageSubmenuMenupopup {
	  border: 1px solid var(--panel-arrowcontent-border-color) !important;
	}
	
	#main-window[fx52plus="true"] #ctraddon_BMB_bookmarksPopup menupopup[placespopup=true] > hbox,
	#main-window[fx52plus="true"] #ctraddon_BMB_bookmarksPopup #ctraddon_BMB_subscribeToPageSubmenuMenupopup {
	  background: var(--arrowpanel-background) !important;
	  border: 1px solid var(--arrowpanel-border-color) !important;
	}
	
}