If your Realtek chipset is among those listed here, I have had very good luck with the official driver. The compiled binary for 2.4.4 is here:
https://forum.netgate.com/topic/135850/official-realtek-driver-binary-1-95-for-2-4-4-release
I run two pfSense boxes with Realtek NICs and have had no problems at all with them using that driver. However, I'm dealing with 100/10 cable connections. I wouldn't expect them to achieve full gigabit speeds and I wouldn't trust them for enterprise applications, but for home use with sub-gigabit Internet connections they should be perfectly adequate.