This is a free browser extension for watching Twitch channels that allows you to get notifications from the Twitch chat, notifications from the broadcaster, notifications for your favorite streams, and much more. All of the features are available for you in one place, which makes things extremely easy for you. The best part is that it's extremely easy to use. All you need to do is to add it to your Chrome browser, and you're ready to go. You don't have to enter any sort of information. 

You can choose to show the notifications on the main screen of your device. You can change your notification settings, but this is what it is by default. The notifications appear in the status bar, so they are visible even when the rest of the page is not open.