Rated 5 out of 5 stars
This is perfect but since firefox 3.5, clutter free no longer works. :(
To Solid Knight: if you have tab mix plus, you can configure all that already
For me the 'Clutter free' feature still works fine
with Firefox 3.5.2, all the extra items are properly removed. Please consider to file a more detailed bug report at my home page, support section.