It is an extension for Joomla! that displays Facebook profile pictures of users who have liked your web page. It also shows pictures of users who have signed up for your site.
If you want to see users who liked your pages, you have to enter URL in the options. If you want to see the users who signed up in your site, you have to enter Facebook Application ID.
The extension is fast and safe because it is based on native Facebook code. It has several options that will help you set it as you wish. You can choose language, number of rows and how to be rendering.