The best addon there is. If you only get one addon, make it this one. In my opinion, the internet is unusable without an adblocker and uBlock Origin is the best around.

Not only does it block ads but for advanced users, it allows to block javascript, and manually filter out each and every connection the websites you visit make. You can see every third party connection and block it as you see fit.

Please donate if you use and enjoy this addon. Well worth it.