firebase-auth-basics

To implement Firebase Authentication, you provision sign-in providers via the Firebase Console or CLI and integrate the client SDK into your app to handle sign-in flows and observe auth state securely.

Before adding Firebase Auth, you need an active Firebase project and the Firebase CLI installed to provision authentication providers and configure client SDK integration for your web or mobile app.

Firebase security rules enforce access control by evaluating the request.auth object, allowing you to protect data access dynamically based on the authenticated user's identity and session state.

Yes, you can provision and configure authentication providers such as Email/Password and Google directly via the Firebase CLI or through the Firebase Console before wiring the client SDK.

The best way to manage user sessions with Firebase is using the client SDK's auth state observer, which listens for sign-in and sign-out events to maintain secure session continuity across app reloads.

Firebase Authentication eliminates the need to write custom boilerplate auth logic by providing secure sign-in, user management, and protected data access out of the box through its integrated client SDK.