How to setup Browser Notification and sound for Incoming Chat Request and Messages in Salesforce?

1. Open the following link to install the package.

For sandbox, use "test" instead of "login".

2. Select "Install for Admins Only" while installing.

3. Add "NotificationsHandler" to the App.

4. Create a Static Resource to store the Sound file.

5. Create an entry in "Conversation Notifications" Custom Settings.

If the sound is not working, try in Incognito mode. This is due to Cache issues.

Video Reference:
Use different ringtone or sound for... x
Use different ringtone or sound for Incoming Chat Messages in Salesforce