This brings back the configurability on FX4+ Rated 5 out of 5 stars

Thanks! As much as I like tha 'new' interface of FX4 (and further nightlies aka 4.2alpha), there is something missing:
You can't easily change some things. Here come the "Firefox 4 UI Fixer" quite handily: without mucking around in userChrome.css / userChrome.js or modifying a theme. it enables a user to adapt FX to his/her likes.
An Idea to think about would be to enable the user to change the background color of the FX-Menu-Button.
Anyway, thanks a lot.

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