@-moz-document url("chrome://browser/content/places/places.xul") {

.menubar-text,
.menubar-text.hover,
menubar > menu[_moz-menuactive="true"] {
  color: inherit !important;
}

menubar > menu[_moz-menuactive="true"][open="true"] {
  color: HighlightText !important;
}

}