For getting instant / Realtime order status, notifications use pusher. Push will release your browser from jamming and crashed.
Goto pusher.com then registration using your email
create app using Channels
Make sure you are selected front end -> Vanilla JS & Backend -> PHP
got app keys and put those keys bellow
If you marked development mode then can see the pusher error / logs. In production just unmarked the checkbox.
If you don't get any notification sound just allow from browser.