@doktornotor:
Multiple of those packages have XMLRPC features. Turn them off.
I've checket all the XMLRPC/Sync options in the packages (I've found them in squid, squidGuard) and all are configured as "Do not sync this package configuration" and I've clicked Save just to be sure!
UPDATE: I've found a Sync config in pfBlockerNG to another pfSense of mine, but version 2.3.2-RELEASE-p1, so I turned it off!
So the notifications stopped! Thank you!