Although my default browser is Mozilla's Camino, I do find myself in Firefox when I need to debug some serious javascript (FireBug is really excellent). Well, I was tooling around my latest web app in Firefox and started thinking, 'Gee, these widgets look like trash'. I remembered reading something a while back about OS X looking widgets for Firefox. I did some searching and the first thing I came up with was an application called Firefoxy. I must say, I love when applications make me laugh:

Update: Check out the best solution I could find in this newer post!