I think senky did an amazing job.
Now if you click on Notifications, at the very bottom you'll be able to Enable/Disable browser notification.
Or you can do it in User Control Panel/Board Preferences/Edit Notification Options
or just click on => this link.
I bought 2 copies, one for gimplearn.net and one thelotteryforum.com.
This browser notification is the push notifications that gets pushed to your browser and let you know in real time.
So if you subscribe to a topic you'll get a notification if someone replies real time. or pm's.
It's great. make the site seem more alive I think instead of having to refresh the page to see notifications.