Looks like crap Rated 2 out of 5 stars

This may be fine on a PC but on the Mac it looks like somebody slapped a piece of grey tape across the bottom. What happened to the sizing indicator on the lower right and the subtle shading that makes it look like it's actually part of the browser? The thin black divider line that used to be there I can live without, even the shading, but not the resize icon. Basically, it looks like what it is: an add-on. It should look like like an integrated part of the browser like everything on the top does. Having said all this thanks for at least doing something. 4.0b6 should have been the final.

This review is for a previous version of the add-on (2010.10.20.02). 

I'm not styling the Add-on Bar toolbar itself. That's all Firefox. Disable the extension and see for your self.
https://bugzilla.mozilla.org/show_bug.cgi?id=489303
https://bugzilla.mozilla.org/show_bug.cgi?id=601304
https://bugzilla.mozilla.org/show_bug.cgi?id=609559
https://bugzilla.mozilla.org/show_bug.cgi?id=599215

Don't blame the extension for things that aren't its fault.