[of]

It's better to download ublock from their source repo here: https://github.com/chrisaljoudi/uBlock/releases

> Due to Mozilla's review process, the version of uBlock available from the Add-ons homepage is currently often outdated. This isn't in our control.

[luxflux]

Actually, this is about uBlock Origin (by the original developer), so it should be: https://github.com/gorhill/ublock