Whenever you see the in page popup “Login to Some Website with Google” that is an iframe back to Google servers. The less Google knows about me, the happier I am.
Is there a reliable mechanism similar to UBlock where I can just block them?
Web search’s have led to “guides” by Google on how to request they stop making it obvious they are tracking you.
Noscript is your friend.
Whitelist the scripts you do need, leave everything else (including all of Google if you want) blocked.