nice theme Rated 4 out of 5 stars

when a bookmarkgroup is pressed ( or hovered ) I get a little bug ,
the depressed ( hovered ) state of the name of the group is not aligned with the arrow -

tried erasing the old userchrome.css , didn't help

also I would suggest changing the font for the addressbar , searchbar and bookmarks with some font from the Lucida family

otherwise i like the idea of proposing substyles and mutliple other options , nice work overall

This review is for a previous version of the add-on (1.0.3).