This is a basic group chat widget that built with Firebase. It shows an example of how to build a simple chat application without any server side code.
Setup a localhost server for running the index.html. If you don’t already have any server, I would suggest you to install NodeJS http-server.
##Configure Firebase
- Go to Firebase and create a new account.
 - Create a new app from your firebase dashboard.
 - Edit 
firegroupchat.jsand replace<YOUR-FIREBASE-APP>with your firebase app to point to your firebase. 
##Configure Facebook Authentication
- Create a new facebook application.
 - Add 
https://auth.firebase.com/v2/<YOUR-FIREBASE-APP>/auth/facebook/callbackto yourValid OAuth redirect URIson the bottom of the Advanced tab (more info). - Go to your firebase account, at 
https://<YOUR-FIREBASE>.firebaseio.com. Click Login & Auth in the left side menu. Select the Facebook tab and check the Enable Facebook Authentication. - Paste your Facebook App Id and App Secret.
 - Run the index.html with localhost