Supposedly no restart required either -- though a bit complex-seeming after first installation.-ewemoa
Not really, you click on the icon in the Addon bar and then select when you want to have that sites cookies terminated, (or not).
Otherwise, you can go to its options, (through Add-ons Manager), and change what you like, they're pretty self-explanatory.
The only things I've changed are:
Grace Period - now 3 seconds
Notifications - checked
Include Local Storage - checked
Clear cache when idle - 30 minutes
Strict Cookie Access Policy - checked
Icon and Menu Entries - checked
Another add-on: Mozilla has released
Lightbeam - it originally started life as Collusion.
The origins of Lightbeam
Lightbeam began in July 2011 as Collusion, a personal project by Mozilla software developer Atul Varma. Inspired by the book The Filter Bubble, Atul created an experimental add-on to visualize browsing behavior and data collection on the Web.

Normally you'd have lines linking all the sites and a few triangles signifying third-party sites you've connected to that href back to the originating site - so I guess all my anti-tracking stuff kind of works
