Rated 4 out of 5 stars

Very good, but an important thing is missing - wildcard or regexp support, so you can use the full address mode for unfamiliar sites or untrusted subdomains, but don't have to add many permissions for trusted sites and subdomains. Blocking an untrusted subdomain might require a blacklist though.

This review is for a previous version of the add-on (0.5.13).