djsaad, have you tried the 9-times, in-and-out belt buckle trick yet? :wink: It worked to turn off the chime on my 2006 Sport (driver's side), may be worth a shot to try it on the FFRR, even though I imagine they may have moved on from the "legacy" Ford electronics on 2010s and later, which is where the trick below originally came from... Worst case scenario, nothing changes.
Turn ignition on then rapidly (within 1 min) fasten and unfasten the driver's side seatbelt, in & out of the buckle 9 times. On the 9th time the safety belt light should stay on for a while and after that you should still get the seatbelt light on the dash, but not the ding-dong. You may want to try it on both driver and passenger side, just in case the chimes deactivate separately. If it works, and you ever want to reactivate the chime, just repeat the procedure.