Be careful when you use GCP and firebase at the same time

If you use GCP from a reseller and use Firebase for Free Trial. When the free trial expires, it will upgrade to Blaze plan and charge you.

At this time, don't downgrade to Free plan. Because it will make your GCP project back to your original credit card. It lost the connection with your reseller. That's not enough, all your instances are shut down!!

The best way is keeping Blaze plan. If you don't use anything on Rirebase, it would not charge you any fee. You can look at the picture, it says "Pay as you go".

This issue has happened for several years. Thay hadn't solved it, because they thought that this is deep integration between GCP and Firebase.

It's really a BUG, but Google thinks it's a feature.