Hi, 

This is webrtc firebase tutorial to create one to one video calling. You need to sign in to firebase and move to firebase console account.

Create new firebase project -> Select analytics to yes. -> after project create just move to the dashboard. After this step move to Firestore and database and click on create button.

After firebase setup just open terminal or command prompt. copy below command to install firebase webrtc sample project. 
git clone -b solution --single-branch https://github.com/webrtc/FirebaseRTC

after installation just move to FirebaseRTC folder in terminal or command prompt by using below command
cd FirebaseRTC

After moving to firebasertc folder. you need to install firebase tools
npm install firebase-tools

You can now check if firebase is installed or not by using below command
firebase --version

Now you need to login to firebase from terminal or command prompt
firebase login

after login you need to to add all files to firebase by using below command
firebase use --add

Now finally use the below command
firebase deploy

after the last command is successful it provide the link to your deployed website you can now share that link to your friends to call them.