Excellent alternative to AdBlock and similar extensions, because of lower CPU/RAM usage and better support for 3rd-party lists.
However, by using the latest stable release (v1.22.2) I lose periodically all subscribed lists, so the browser navigation freezes until I disable/reinstall uBlock.
The issue is fixed in v1.22.3.x beta, I hope you'll release them in stable branch asap.
Actually I'm downloading uBlock beta from the official Github repo.

The most powerfull ad-blocker. Installed on all my browsers

Super

Thanks for excellent addon.

Adblock Plus stopped working randomly today, so I installed this and I am safe again. Thanks!

Esta extensão é a melhor quando se trata em bloquear rastreadores e anúncios. Indispensável.

very good!

It really slowed down opening up Firefox, I had to wait 3-5 minutes for any page to open. Deleting it stopped the problem so definitely something related to uBlock.