How To Enable Built in Facebook Messenger in Firefox?

Mozilla has released Firefox 17. It includes Social API which helps you connect Social sites like Facebook, Twitter etc right from the browser windows without going to social sites. You can easily chat with your friends, check messages, notifications, etc with this function. This feature will add social network buttons and sidebars in Firefox window so that you can chat with your friends, check messages, notifications, etc quickly and easily  But it is disabled in Firefox by default. You need to manually enable it. You can also disable it if you don't like it. To enable it follow the steps below-  

> Open Firefox. Download Firefox
> Go to the following link- Enable Firefox Messenger
> Click Turn on
> Log in
> Have Fun

To disable messenger, click Facebook button in Firefox Toolbar. Then uncheck Show Sidebar.