I am fascinated to configure the api_keys from firebase hosting, see (https://firebase.google.com/docs/hosting/reserved-urls?authuser=3)

Version info

Angular: ~8.2.9

Firebase: ^7.8.0

AngularFire: 5.4.2

How to reproduce these conditions

Tring initialization with empty props

Expected behavior

AngularFireModule.initializeApp()

Actual behavior

AngularFireModule.initializeApp(environment.firebase)