The best add-on ever! I mean, It blocks EVERYTHING, it's FREE SOFTWARE (GPLv3), and fun fact, it works better on Firefox than on Chrome! Thank you @gorhill and thanks to all the devs involved on this magnificent open source software <3

Simply the best.

After installing FF, install this addon. It is a must if you want to enjoy and be safe on the Internet. The developer's "about this extension" is true, the UI is easy to understand and view, and the developer is active. This addon and its' developer are a bright light in a dark Internet that demands more and more of us. It makes the Internet fun and useful again.