I tried out new version of Firebase. I have created new project. Added there necessary apps. After that I added the test app, which I don\'t need any more. But I could not
Go to setting of project
Copy project ID
Click on a delete project at the bottom.
Confirming the earlier answers provided, here's a detailed step-by-step.
Caution, this is a permanent action. Deleting your app will delete the corresponding Analytics data, but not your app's API keys or OAuth clients.
A prompt will be displayed on the upper right corner of your Console would show up confirming the deletion.
Step 1: From "Project Overview" select settings of the app you want to delete.
Step 2: Click "Delete This App" button on the bottom of your app details.
You must delete all Role except Owner in Manage Permission in console.firebase.google.com before delete current app from project in Firebase
Delete an app Sign in to Firebase, then open your project. Click the Left Side Menu ->Project Overview Settings icon, then select Project settings. Then Scroll Down the Your apps card, Under the Your apps card, click Delete project open popup. Check that the desired app is being deleted, then click Delete Project app permanently.
Ok the feature has been added. Project settings > select the app > Advanced Options > Delete this app