Facebook pixel is an analytics tool that allows you to measure the effectiveness of your advertising.
FingerprintJS is a browser fingerprinting library that queries browser attributes and computes a hashed visitor identifier from them.
Google Analytics is a free web analytics service that tracks and reports website traffic.
jQuery is a JavaScript library which is a free, open-source software designed to simplify HTML DOM tree traversal and manipulation, as well as event handling, CSS animation, and Ajax.
Select2 is a jQuery based replacement for select boxes. It supports searching, remote data sets, and infinite scrolling of results.