[Getch]

Upon further investigation, I think it is a setting in your webserver. I think it is set to handle .cgi files as scripts, and .html as pure HTML files. Definitely not a Firefox issue as IE has the same problem.

Also, if you do change .html to .cgi, you'll need to change every reference of .html in the code to .cgi, not just the names of the files. But again, I think it is a web server setting.