Adding pfBlockerNG
Login to your pfSense, and go to Systems -> Package Manager.
Find the pfBlockerNG package in the Available Packages list.
You will notice that there is two versions of pfBlockerNG. The devel version is a few version ahead of the other package, and may contain more features. This is the version I use on my system. Click install to install the package.
Confirm.
That's it! pfBlockerNG is now installed.