You aren't being rude, you are withholding required information, which is only hurting yourself. Before we can tell you where to get the correct version of the library, you need to answer the questions I asked. Not because we're being nosy, but because without knowing that, you could install the wrong one and cause harm to your firewall (at worst) or have a broken application (at best).
For example: pfSense 2.4.4-p2 is based on FreeBSD 11.2. Your application and the library you are seeing must also be compiled for FreeBSD 11.2. If your application is compiled against FreeBSD 12, it's likely to fail.
If you don't want to answer any questions, then the solution is: Get it from FreeBSD. If you need more guidance than that, you need to cooperate, or this thread is useless.