Firefox

Don't think it's with Meta directly, but ex-meta folks now working as Anonym, which Mozilla recently acquired. I'll check the announcement and docs again later, just in case I misread. I fully support criticizing dubious software and decisions, but I believe we need to do it properly, otherwise it's just noise.

Edit: really sorry folks, I got things mixed up.

For the last few months we have been working with a team from Meta (formerly Facebook)
source - mozilla blog

But searching this did lead me to find out this is done in partnership with the ISRG

Our DAP deployment is jointly run by Mozilla and ISRG.
source - explainer on github

Which is sponsored and partly led by the EFF—haven't seen these folks miss horribly yet, though feel free to point out an example.

...I almost made a lengthy argument here, but it wouldn't be directed at anyone in this thread. Bit tired. My point is, lots of folks whose work I respect (even if begrudgingly) involved in this. I want to give it serious consideration, not throw it away because "fake privacy feature." If it works and is widely adopted, I can see the argument for how it'd be better—unfortunately, most people still browse the internet without uBlock.

Doesn't mean I'll stop installing uBlock on every device I can; I'm simply accepting that'll never be every device on earth.