First go to Firebase Click on Get started in console.

Click on setting up a Firebase project.

Set up AI assistance for your Firebase project.

Make sure that enabled the Google Analytics for this project and click the Continue and Create the project.

Give your analytics location for more accuracy.

Now your project has been created.

Choose add app icon.

Then you need to create web app in that project for that click the web app icon in the project like shown below.

Set the name for the app and register the app.

Here you can see all the details we need you can copy them and after that select npm and click the Next Button.

After that you can click Next Button for Install Firebase CLI.

After that click the Continue to console.

After that you can see the app inside the project and click on the setting icon of the app to see the details of that app.

You can see the credentials(apiKey, authDomain, projectId, storageBucket, messagingSenderId, appId, measurementId) in the General --> Your apps.

Now we need to create a Vapid goto the Cloud Messaging --> Web configuration --> Generate Key pair.

We can see the Vapid here.

After that navigate to Firebase Admin SDK under Service accounts, select Python and Generate new private key. It will generate a json file containing all remaining credentials.

Downloaded json file.

Goto the General Settings --> Firebase Push Notification --> enable the 'Enable Push Notification' then you can set the credentials.

Its very important that You must Allow the notification in the web browser.

If you are using firefox browser you need to allow the notification from clicking top of the browser and allow like in the above image

If you are using Brave browser you need to enable Google Services for push messaging for that goto the brave://settings/privacy in brave and enable 'Use Google services for push messaging' like shown in the above image.

After Allowing the notification access in the browser you can click the "TEST CONNECTION" Button.

Then you can see a notification on the system, and you can see a green popup.

After that you can send message from the chatBox module or in the discuss module.

Then you can see a popup notification in the other user and when you click on that it will be redirected to the odoo instance.