Gnarf is a chrome extension which displays if you have unread GitHub notifications, and allows you to go to the first one, in order to visit them all without having to go back to the GitHub Notifications home every time.
Because naming is hard.
You can install the extension like any other one.
Once this is done, go to create a new token at this address: https://github.com/settings/tokens
Visit the page's options and set the token there.
Thanks to michael for the github client.