I know this question have been answered here on stack overflow, but in my case, I have a project in my google developer console named "firebase-demo-project". In this same console, I cannot delete the project : it seems I don't have de right permission to do so (the delete options are grayed).
On the other side, in the firebase console for the same user, I have no project at all. So I cannot just delete the project from firebase since it's not there.
Anyone can help with this ?
Its simple. Open Firebase console (https://console.firebase.google.com) Click on Explore Demo Project Button On the next page on top right click on Exit Demo. That's all.
Now in you Cloud Console, your firebase demo will be gone. (refresh page if already open).