.tabbrowser-tab[selected="true"] {
  background-color: #666666 !important;
  background-image: none !important;
  min-width: 200px !important;
  padding-right: 6px !important;
}

.tabbrowser-tab[selected="true"] .tab-text {
  -moz-opacity: 1 !important;
  color: white !important;
}

.tabbrowser-tab[selected="true"]:hover .tab-text {
  -moz-opacity: 1 !important;
}