I’d really love to see this in Firefox, even though I already use uBlock Origin, Privacy Badger and Container Tabs. Even if this is added, I’d still not give up on these extensions.

Though Brave has been involved in (controversial?) work that’s tangential or unrelated from the core web, such as a substitute for advertising based income for sites, a crypto wallet, etc., I do admire the relentless focus on creating features that help and protect users. It also seems to have a higher velocity of feature releases, perhaps because it can still rely a lot on the open source Chromium project (which it customizes) as opposed to the Firefox team that has to maintain and improve Gecko/Servo as well as handle end user facing features.