Firefox and Chrome – blocked/unsafe ports

I used a port, 6666, which happened to be blocked by both Firefox and Chrome browsers. So after a little research, I understood that some ports are blocked by default including the one I used by both browsers. Hence this post on all blocked ports by them. Mozilla Firefox Mozilla Firefox blocked/unsafe ports 1tcpmux7echo9discard11systat13daytime15netstat17qotd19chargen20ftp […]