Rated 5 out of 5 stars
This is an example of an add on that extends an existing feature with great new functionality. The exceptions dialogue has always missing a good way to find existing rules except of just scrolling down and manually looking for them. One thing that makes this such a valuable add on is that it is simple. It does exactly what it meant for in a simple way and nothing more that just adds clutter.
But now I have realised that the exceptions dialogue is missing one more feature that there should be another add on for, a way to block not all cookies for a domain but selective cookies by domain and cookie name. It is often a problem if a domain are prevented from adding any cookie at all but some cookies mostly or only used for tracking purposes should be prevented and with more fine grained exceptions could it be possible.