Messenger Notifier is a new tool for the Messenger app. It is a browser extension that lets you check your Facebook messenger account from your desktop browser. The app notifies you of any new messages or posts that you received. It also displays a count of unread messages.

To start using the extension, you will need to create a Messenger account first. To check your account, click on the icon on the top right of the browser. This will open a popup window. You can see all the messages that have been received and sent by you and your friends.