Firebase extension not working properly

i have used firebase login in my app and its working fine. but i want to block some user for using my app when i open the firebase authentication website and disable the user email id but still the app is opening. why?

I think it’s because firebase leaves the session opened.

When you leave the app you should close the session so that when you come back in you can’t do it.


but i didn’t want my users to login again and again they will get irritated.
is there any other way to do that and block the unwanted guest.