Boy have these popups gotten annoying. I have no interest in logging in with my google account. What’s worse is that if you are not logged into Google at all, these popups return even if you go through the trouble of disabling them in your Google Account Settings.
To get rid of them for good, I had to block them using content blockers.
For example, users of uBlock Origin can add the following line to their custom filter to block the popup:
||accounts.google.com/gsi/iframe/select$subdocumentI can finally browse websites in peace!