Xtreix Also, as far as I remember, Site Isolation does not prevent cross-site tracking, but is rather handled by the network and storage state partitioning.
I am not going to promise I used the right terminology in my previous post, but it is state partitioning I was talking about, where Firefox (at least hardened forks of it like LibreWolf) is ahead of Chromium (including hardened forks like Vanadium).
Xtreix My understanding is that security is necessary to ensure adequate privacy protection. Otherwise, in the absence of security or serious security with best practices, privacy protection becomes too fragile and we probably shouldn't rely on it.
Depends on threat model. I feel on this forum specifically the sentiment one cannot have privacy without security has been expressed a lot, and I don't agree with it. Sure, if your attacker will compromise your privacy by hacking your device, then you cannot have privacy without security. But if your attacker just want to figure out who you are by correlating activity between sites or tracking you between sites, pure privacy features help a lot, way more so than pure security features.