Firebase Auth Quickstarts

The Firebase Auth quickstart demonstrates several methods for signing in:

• The Firebase email and password authentication quickstart demonstrates using a Firebase stored email & password to authenticate - you can both create and sign in a user.
• The Firebase email link authentication quickstart demonstrates using an email address to sign-in without a password, via a link sent through email - you can both create and sign in a user.
• The Firebase phone number authentication quickstart demonstrates using Firebase phone number authentication using three different techniques: with a visible ReCaptcha, an invisible ReCaptcha and a simplified popup flow (not recommended for production apps).
• The Firebase Google Sign in quickstarts demonstrate using a Google account to authenticate to Firebase using three different techniques: with a popup, a redirect and an auth token.
• The Firebase Facebook Login quickstarts demonstrate using a Facebook account to authenticate to Firebase using three different techniques: with a popup, a redirect and an auth token.
• The Firebase Twitter Login quickstarts demonstrate using a Twitter account to authenticate to Firebase using two different techniques: with a popup and a redirect.
  • The Firebase Microsoft Login quickstarts demonstrate using a Microsoft account to authenticate to Firebase using two different techniques: with a popup and a redirect.
• The Firebase GitHub Login quickstarts demonstrate using a GitHub account to authenticate to Firebase using two different techniques: with a popup and a redirect.
• The multi-factor authentication quickstart demonstrates using email & password as the first factor and phone number as the second factor to authenticate - you can both enroll for the second factor and sign in with the second factor. Note: Multi-factor authentication with SMS is currently only available for Google Cloud Identity Platform projects.
• The Firebase Anonymous auth quickstart demonstrates how to authenticate to Firebase anonymously.
• The Firebase custom auth quickstart demonstrates how to authenticate to Firebase with a user who has been authenticated from your own pre-existing authentication system. This is done by generating a token in a specific format, which is signed using the private key from a service account downloaded from the Google Developer Console. This token can then be passed to your client application which uses it to authenticate to Firebase. We provide an example token generator for demonstration purposes. Note: Generating tokens in production should be done server side.

We also provide the code for a Chrome Extension showing how to setup and authorize Firebase in a Chrome extension.