You might have noticed that even on Firefox (depending on your lists) YouTube may detect uBlock Origin on Firefox now
There's already a workaround (found, again, here), but I figured I would use this opportunity to tell people that projects like Piped and Invidious exist, which both allow you to watch YouTube without loading their ads, with improved Privacy and (in the case of Piped) even Geoblocking-Circumvention and SponsorBlock out of the box.
They're both great tools, and using something like LibRedirect you can even automatically go to Piped or Invidious when clicking/opening a YouTube link (and more).
Both don't load ads, but unless changed in the settings Individous may still make connections to Google/YouTube to load the video(s) themselves.
Bit of a shameless plug for these projects, but I figured this is a really good time to show these projects as I often see people asking what they are in threads on here
It still doesn't matter. A website can choose which attestors to trust (if they had to trust all of them the whole thing would be useless), so Youtube can just deny access to the video streams to anything that isn't a trusted browser environment, and anything third party like Invidious, Piped, Newpipe, Freetube... won't be able to work anymore.
Well yeah. But those clients could ultimately just say they are firefox if Mozilla is open enough, which they tend to be. It ends when Google decides that stuff like YouTube should only work on chrome. That would be bad, and I think regulators would treat it as bad, especially the EU.
Just to be clear, I don't think forcing this standard down everyone's throats for naked commercial reasons is a good idea either.
IIRC the proposal includes some crypto-handshake verification to make sure the attestor is who it claims to be, so no, apps can't just fake it. Or, if some of those secret keys leak and apps use it, sites won't accept it anymore.
It's a question of trust. Google will select the certificates they trust for the services they provide, and the entities that own those certificates will decide what do to with them. If they trust a certificate from Mozilla, and Mozilla agrees to make that certificate open to everyone for instance, than Google's only choice is to stop trusting it. But if Mozilla decides that is the certificate Firefox will use, than Google has to choose kicking off Firefox as well as other third party apps. Same with Microsoft and Apple, but I think Mozilla is more likely to oppose this kind of standard rather than try to reach some kind of agreement with Google.
The other way that this could play out every browser dev makes some kind of arrangement. Very unstable when we are talking about competitors.
At the end of the day, it requires a level of co-operation with the browser developers and internet service providers that I don't think a lot of people will go for, for various reasons. Especially not regulators. I guess I am just more optimistic about the open internet.