Stop "Sign in with Google" pop-ups

I'm using Firefox and autodelete all cookies - except a few whitelisted - after closing its tab or the browser. The default solution to disable Google Account sign-in prompts in the Google Account settings doesn't work as I'm no longer logged into Google when I close its tab or my browser.

The solution I found for Firefox is using the following string as as custom rule to your adblocker:

||accounts.google.com/gsi/iframe/select$subdocument

This should also work for Safari except that the only adblocker I could find that allows custom rules is AdGuard for Safari. After installing AdGuard for Safari I opened the settings, clicked on Filters tab, enabled User rules and clicked on User rules. This enabled me to paste the custom rule and click on Save to enable it.

I tested it by going to Reddit and the "Sign in with Google" pop-up no longer appears. After disabling all AdGuard for Safari extension and reloading Reddit the pop-up came back. After enabling extension in Safari I discovered you only need to enable AdGuard Custom to enable this User rule.

Tested some further and closed AdGuard for Safari (not keeping it active in menu bar) and disabled launch at login and it still works.

Credits: https://www.ghacks.net/2022/12/24/how-to-block-sign-in-with-google-popups-on-sites/