Superb blocker of inappropriate content. The best I've seen without any need for manual settings. The password lock is nice but on FireFox it still is not capable of protecting itself from someone accessing the add-ons manager or by the 'Firefox refresh' through about:support or the 'Restart with add-ons disabled' from the 'Help' dropdown in the settings. The add-on also does NOT work in private-tabs. If the function in private tabs and security can be improved, this would easily top all as a complete package and no need to look elsewhere.