.tabbrowser-tab[selected="true"]:not(:-moz-lwtheme) {
background-image: -moz-linear-gradient(bottom, rgba(10%,10%,10%,.4) 1px, transparent 1px),
-moz-linear-gradient(white, rgba(255,255,255,.5) 50%),
-moz-linear-gradient(hsl(214,44%,87%), hsl(214,44%,87%)) !important;
}