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

#PersonalToolbar, #nav-bar {
    background-image: 
        url("data:image/png;base64, iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAABGdBTUEAAK/INwWK6QAAABh0RVh0U29mdHdhcmUAUGFpbnQuTkVUIHYzLjA4ZXKc4QAAAC9JREFUOE9j5LcMWsxATQAykJqYgZqGgX07aiDFETQahpQn8tEwHA1DMsrKwZ9sADuo19oANiVcAAAAAElFTkSuQmCC") !important;
}