Crashed Firefox 18.0.1 Rated 3 out of 5 stars

I had to restart in safe mode (shift+open) to remove this restartless addon. I like the concept, but unable to use.

This review is for a previous version of the add-on (0.2.2.1-signed). 

Workaround

Sorry about that. Do you have a large amount of pre-existing cookies (think 2000+)? Try removing them before installing the add-on. I'll address this in the next version. Its just not designed to dispose of this many cookies at the same time, so it seems like it's frozen during startup. You could also just wait a bit longer until the contention is resolved, the browser should "unfreeze" all by itself.