Works great. If you get two rectangles, one grey one red, you need to do a clean reinstall of firefox.

This is an amazing add-on! It's unobtrusive, it's powerful, and it's damned effective, even at blocking ads on Youtube. It is nicely adjustable as well, letting you block irritating elements on a page.

the best add block extension of all time, it has never failed me up on its' task. thank you so much uBlock Origin

Super efficace !

best adblock for years now.

best adblocker out there!

Una meravella. El primer que faig en instal·lar Firefox és afegir uBlock Origin.