Ich mache das so:
CSS
#urlbar[level="high"] > #identity-box > hbox,
#urlbar[level="high"] > #identity-box {
background:green !important;
color:yellow!important}
alternativ so:
CSS
#urlbar[level="high"] > .autocomplete-textbox-container {
background-color:#00FF7F !important}
#urlbar[level="high"] > #identity-box > hbox,
#urlbar[level="high"] > #identity-box {
background:green !important;
color:yellow!important}
[Blockierte Grafik: http://www7.pic-upload.de/thumb/01.12.13/782gwgxwjdod.jpg]