I love FF but one of my pet peeves is how it sometimes messes up the favicons in my bookmarks. This plugin works perfectly, allowing you to reset or even set your own custom favicon. Plus it’s totally unobtrusive, just adds an extra option in a bookmark’s properties window.

Nice!

Favicon Picker 3 :: Add-ons for Firefox

After looking through the entire firefox themes directory, I’ve concluded that they’re all hideous. If you want something that looks good in Vista, anyway.
The only decent one I found (and the one I’m using) is ChromiFox, which rather sadly is a rip of the Google Chrome skin.
Oh well, I guess they can’t get everything right…