This is PrestaShop module that creates sliding box with new responsive facebook page plugin. This module allows to slide out this box with "on click" method and also with "on mouse over" method. This is great marketing plugin that will gain more facebook followers on your fanpage.
more informations about this module you can find here:
Facebook like box - new page plugin - slider
You can find there only valuable solutions for your e-commerce shop based on PrestaShop engine. Search the best plugin for your store that will meet your requirements and just use it.