I've never been a Mac user but Camino is looking incredibly familiar to me. There must have been a FF theme back in the day that. The scrollbar I can understand, guess it's just cocoa or something, but everything else looks the same.
I remember Camino and the first Firefox for Mac pretty well, and they both looked quite similar. Which is probably another reason why Camino, the wonderful brother, got forgotten.
Myself as well. I'm almost certain I've seen those toolbar icons in an early Firefox theme.