Norton Blocking sites with Protocol Error by Firefox suggesting contact websites

Randomly but now very frequent when I type into the search box for a known site Norton is blocking and saying " Protocol Error Unable to open the site" Recommends contacting Firefox" Norton message says We prevented your connection to orbitsearchonline.com because of dangerous webpage. But I have never tried to connect to this website. This started after the new update to Firefox about a week ago. Can you help please.