Since I upgraded to Ubuntu 18.04 it always bothered me that when I tried to add a specific network printer it would add hundreds of printers in my network (same model so it named them similar).
Well, I found in stackoverflow how to disable auto discovery.
edit /etc/avahi/avahi-daemon.conf and insert below the [server] section this line:
then restart the avahi-daemon service:
sudo service avahi-daemon stop
sudo service avahi-deamon start
The problem later was that the printing dialog in Chrome took a long time to load, so I reverted the configuration back.