Now that you mention that, I do have one site that I access and the sysop had to help me because there was a local file that I had to make with a 512 bit public key file. But this was an non-obvious thing to make, rather than a "hey the browser can do it" automatically.

Anyway, now that is "set-up", I can open command a window via Putty or FTP stuff to/from this site with Firefox. I haven't had the need to talk to this site via LWP yet. And I wouldn't know how to do it. I await wiser Monks.