I can answer this question-
MFR is Myofascial Release. It is a slow hands in therapy that intends to impact on the facia that surrounds or covers your muscles. To give you an idea about what is fascia . You’ve all seen a whole chicken and know that there’s a little something between the muscle bellies of the meat that compartmentalizes them. It can just be there between sections or it can be tougher or tight in some places. Fascia holds the muscle bellies in place , similarly in us humans. . Fascia can tighten down or bind things down . This slow hands on treatment called MFR helps to soften the fascia so your muscles or whatever structures it’s impacting can be a bit freer. Allowing muscles to move more freely to their full range, etc.. Hope that helps!!

@briarrose MFR is myofascial release which is a specialized type of physical therapy to stretch tight fascia. You probably have seen fascia when skinning a raw chicken an it's the cobweb like tissue. It permeates everything in our bodies and can become damaged or restricted which prevents normal movement. These experts are trained in the John Barnes methods as he is the one who created this therapy. I have done a lot of this MFR and it has helped me a lot. You can learn more about it in this discussion. The beginning pages have lots of links to information and videos.
https://connect.mayoclinic.org/discussion/myofascial-release-therapy-mfr-for-treating-compression-and-pain/