That article is wrong (at least for the very invasive browser based login overlay), I think I found that article when I first try to do this a month or two back.
Although I did figure it out from a link on one of the google account pages telling me how to disable it as a chrome setting, which I previously missed, so the nudge to at least try those steps again helped!
What Sign in with Google does Important: To use Sign in with Google, you need a Google Account. Your Google Account is the same account you use for Gmail, Drive, and other Google apps. Sign in with
support.google.com
Third-party sign-in is a type of federated sign-in that allows you to log in with an identity service, instead of creating unique login credentials for each individual website you visit. If you allow
support.google.com
This is the key, it was quite well hidden in the Chrome settings:
Manage third-party sign-in prompts
To select your third-party sign-in prompt preferences:
- On your computer, open Chrome.
- At the top right, click More Settings.
- On the left, click Privacy and security Site settings.
- Under “Content,” click Additional content settings Third-party sign-in.
- Select the setting you like:
- Sites can show sign-in prompts from identity services
- Block sign-in prompts from identity services
Thank god that's sorted, it's been driving me insane how many sites have that pop up now, and because I'm signed into so many google accounts it always shows all my accounts.
Thanks