toolbarbutton[type="menu-button"][open="true"] > .toolbarbutton-menubutton-dropmarker {
padding: 4px 0px 0px 2px;
}
toolbarbutton[type="menu-button"]:hover > .toolbarbutton-menubutton-dropmarker,
toolbarbutton[type="menu-button"]:hover:active > .toolbarbutton-menubutton-dropmarker,
toolbarbutton[type="menu-button"][open="true"] > .toolbarbutton-menubutton-dropmarker {
padding: 4px 0px 0px 2px;
}
toolbarbutton[type="menu-button"]:hover > .toolbarbutton-menubutton-dropmarker,
toolbarbutton[type="menu-button"]:hover:active > .toolbarbutton-menubutton-dropmarker,