Browser Push Notifications
Browser Push Notifications are nice except you may notice that you sometimes stop receiving them. It appears that when your web browser gets update you have to re-enable browser notifications again. If you had it enabled, but are no longer receiving the notifications, just go back to settings and enable it again.
Alternatively, Telegram notifications is nice and doesn't have this problem.
Browser notifications and telegram notification have been limited to sending once every 5 minutes (instead of once every 1 minute). A setting will be coming where you can pick the frequency.