lilidede, this is an unfortunate interaction between a new feature in Firefox and a bug in the web age in question; the net result is that the page decides that Firefox 4 is actually Internet Explorer and tries to use some Explorer-specific features. This doesn't work that well, of course. This will need to be fixed by whoever maintains this web page. https://bugzilla.mozilla.org/show_bug.cgi?id=644597 is tracking that happening. I filled out the generic Baldwin contact form with information about this, but if you're affiliated with the school and know someone specific we could contact to get this fixed, that would be really helpful!