I using userchrome.css to remove the blue bookmark star from the toolbar, but I cant figure out how to remove the button separator (vertical line) from the bookmarks icon that remains. To remove the star I have tried both of these, but they both leave the separator. #bookmarks-menu-button toolbarbutton { display:none!important; } #bookmarks-menu-button toolbarbutton { visibility:collapse !important; } I know that the remaining icon is: #bookmarks-menu-button .toolbarbutton-menubutton-dropmarker .dropmarker-icon but I cant figure out how to target the vertical line. Thanks