For this part, I did the Firebase Web Codelab, which involved doing a FriendlyChat_Demo
The original repository used was this one: //github.com/firebase/friendlychat-web
The tutorial followed was this one: https://codelabs.developers.google.com/codelabs/firebase-web/#0
Firebase Project: https://console.firebase.google.com/project/friendlychat-f63cb/overview
The .mov file is a video of how the app should work.
The localhost number must be set to a different value each time firebase serve is typed in the Node.js command prompt (5001, 5005, etc.).