uBlock Origin works, but when I watch videos on YouTube they keep loading, I deactivate the blocker and the videos are seen again, I only have this inconvenience with Mozilla, since with the other browsers such as Opera, Brave and Chrome it works correctly.
I hope they can solve it soon, greetings.

The best adblocker out there

Best adblocker that every user should use. I expect ubo to be more popular in firefox when chrome cripplies their adblock powering technology

A good replacement for "NoScript" and it's overly verbose interface, not to mention lack of browser ecosystem support.

Does a lot more than just block ads. Try exploring the options, and learn what they do. Several important ones are turned off by default for the sake of compatibility.

uBlock Origin is fantastic! It has a small footprint and I never see ads anywhere! Not even on YouTube! I've been using this add-on for several years and plan to continue using it.