Great but not perfect (yet). Rated 4 out of 5 stars
Cookie Controller is my favorite FF add-on for managing cookies. However, I have one serious concern. When I use private browsing and I allow cookies for a website vie Cookie Controller, this permission is maintained in FF even after the private browsing session has ended. This flaw undermines the whole idea of private browsing in FF.
It would be great if you could address this issue.
Private browsing will be supported when per-window private browsing comes in, probably Firefox 20.