How to downgrade from Firebase auth with Identity Platform to Legacy Firebase Auth?

Question

I may have upgraded Firebase auth to Firebase auth with Identity Platform GCP. I came to know it has a Paid Tier and I really don't use any upgraded options other than basic auth.

I want to go back (downgrade) to Firebase Legacy Auth

Firebase docs don't mention how to downgrade. Nor anything is mentioned in Google Cloud Platform docs .

Answer 1

At the final step in the upgrade process, you get this dialog:

As you can see at the bottom there: You won't be able to reverse this decision , so there is indeed no way to reverse the upgade.