Currently, this new API supports Facebook only. However, Mozilla ensures that in the future Firefox will support more social services and blogging networks. Here is how to enable Facebook Messenger in Firefox 17, so you can chat with your friends, see new comments, photo tags and other stuffs instantly – no matter which site you’re currently looking at.

Go to this Facebook link from Firefox, click on the green “Turn On” button and complete the action. This will enable Facebook messenger in Firefox.

It’ll also add Facebook featured buttons such as notifications, messages, etc. in Firefox’s toolbar as well as Facebook Chat bar at the right side of Firefox’s window.

You can enable, disable or remove all these features by right clicking the Facebook button on Firefox’s tool bar.