How to disable Google One Tap sign-up prompts?

Solution 1:

You can disable these prompts from your Google account's permissions page:

https://myaccount.google.com/permissions

Or go into your Google Account Settings and to the Security Tab. Here you will find a section "Signing in to other sites". Select the "Signing in with Google" link to get to your permissions site.

Google Account sign-in prompts

Allow Google to offer a faster way to sign in with your Google Account on supported third-party sites

Toggle off "Google Account sign-in prompts" to disable these prompts across the web.

Don't be fooled by the toggle since it currently doesn't seem to display the toggle state correctly. Click it once and refresh.

Solution 2:

In your Adblocker, block all content from smartlock.google.com. That will be the end of these popups.

This popup is provided by a Google service website owners can select to integrate on their websites.