For me it mucked up Firefox, giving me "Enable Firefox" (already enabled) and forcing Firefox to ask for permission to open each site. I mention this to give the head's up. BUT as someone wiser said, it's "an awesome addon, [but] you have to be extremely careful with it. It can really mess up your web experience if you don't know how to use it."

It works well... TOO well. It does a great job at blocking all the stuff it needs to, but compared to other extensions like uBlock, it causes almost every site to break - I have to constantly go in and set a load of stuff to trusted just for even basic site functionality to work. It's an eye-opener; you really get to see what random stuff every site is trying to ping off about you, but at the same time, everything breaks. For this reason it's just become an annoyance to me and I've gone back to uBlock.

Great extension. Works perfectly. Thanks.

Fantastic extension, don't go out on the web without it! There are some sites that I give permanent access, others temporary access, and others the default. Only a very few have made it into the "Untrusted" column, banished forever, lol.

Excellent beginner add-on, by which i mean if you wants something that works and is easy to use this is the one for you. Not technical experience needed to use.

This app is a must have for any browser you are using. It lists EVERY SINGLE SECRET THING on a webpage. Not a simple "number" that the app is saying it's blocking (usually its not really blocking) like so many other apps! Chrome is removing it because they suck and want to track you. Thankfully FireFox and other awesome browsers are not!

Наконец-то за мной не будут следить.

It breaks YouTube even if it's trusted.