> You're saying it was normal (and is even today) to show HTML files over ftp links? I've never seen a browser do HTML over ftp
Firefox supported this completely until Fx61, when it disabled FTP subresources on HTTPS. Even then, you could still view HTML pages served over FTP until Fx70.
Well, I'm not saying running ftp to serve html is better. All I'm saying is that it can sometimes be the only supported option, or viable option. And there are major differences. Webserver access permissions vs. ftp server permissions for example?