I just checked, and it's confirmed: I am definitely using a web browser. It seems my browser and this site have a different definition of web standards, however.
So exhausting to be surrounded by people with a paranoid, irrational fear of robots, who don't give a shit who they harm in their zeal to lash out and strike the evil bots.
Apparently the owners of that website don't like my choice of user agent, and have decided to punish me accordingly.