Is there a pfSense plug-in that functions like Pi-Hole, or would it be too much for pfSense?
pfblocker ad blocking https://youtu.be/QwFpMwXEK5w
that is what I use in my setup. The lists that I use to block ads can be found here:https://firebog.net/ . The ones with the check mark next to them are least likely to interfere with normal internet browsing.