Not really. I set my VPN endpoint to Sweden, disabled adblock and Google started showing me ads in Swedish. Also back when I still used my Google acc they showed me ads for things that I've already bought. Their adtech stuff is way dumber than you think it is.
That browser requires an account. Most people use it with a google account, because they are using gmail and other google services. So their adtech doesn't need to be that smart.
Why bother trying to track a Firefox user who uses a VPN and an adblock when most of your users don't even bother to hide from you?
