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.
It’s buried in advanced settings. Preferences>Settings>I am an advanced user, then when you open the ublock panel on a website, you can disable 3rd party frames and scripts. As Oberon said, adding ‘accounts.google.com/gsi/client’ to My filters blocks google specifically.