I'm not sure how people not already having hit this very issue before is supposed to know about it beforehand though, one of those things that you don't really come across until you're hit by it.
Fun learning new things so often but I never once heard of the public suffix list.
That said, I do know the other best practices mentioned elsewhere
Google 90s to 2010 is nothings like Google 2025. There is a reason they removed "Don't be evil" ... being evil and authoritarian makes more money.
Looking at you Manifest V2 ... pour one out for your homies.
This is the first thing i disable in Chrome, Firefox and Edge. The only safe thing they do is safely sending all my browsing history to Google or Microsoft.