good idea, buggy app Rated 1 out of 5 stars
The concept is great, but it cripples the layout of many sites, try using facebook chat or doing searches in youtube and you'll see. It took me a long time, and a tedious uninstall-reinstall of all my 20+ apps to realize that these two little buttons were the culprits. It happens in several versions of FF (2.0, 3.0 and 3.5 at least).
Needs more testing and developing it's a pity because the functionality is badly needed