Firebase: This domain is not authorized

Question

I imported Firebase JS v3 API and used to initialize Firebase using:

firebase.initializeApp(config);

However the app failed to load correct

Answer 1

Problem Authorised domain Firebase Locahost OAUTH2

If you are using Google Chrome you can see a problem with the Identity Toolkit API DISABLE. You need to enabled this API on the google cloud project to get OAUTH servcies in Firebase project.

https://console.developers.google.com/apis/api/identitytoolkit.googleapis.com/overview?project=project-id

Answer 2

I solved the problem by adding the localhost domain to OAuth redirect domains (within SETUP SIGN IN METHOD on the Auth tab of Firebase console).

Answer 3

Not really specific to Android, but check the address in your actionCodeSettings.

actionCodeSettings.url must be correct and whitelisted.

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