“Proto for FireFox Mac OS X”

If you're running one of the FireFox 3 prerelase versions, you should install this theme. It's a pre-release version of the "mac look and feel" that Mozilla is preparing, bundled as a theme. I've read that they'll be shipping it with FireFox 3.0 when it's ready, but I now I can't find where I read it.

Huge improvement over what 3.0b1 ships with.

Note that "huge improvement," doesn't mean it's great. The toolbar area is now way too heavy and dark, which is exactly the oppsoite of Firefox 3's default theme. This theme is way better, but it's not nearly as good as Safari.