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

This review is for a previous version of the add-on (1.4). 

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.