Hi, that is actually a malformed pdf extension and really is a bad way of doing things. Firefox is looking at as it should be looked at. You can install Adobe Reader DC into your system then then go to Firefox Options --> Forms & Applications --> pdf and have Adobe open the file, but again it is a malformed address.

Yes I figured that they were doing something wrong, but businesses tend to ignore my suggestions on such topics. For a variety of reasons I'm shying away from the Adobe programs, so I guess for now I'll just use Chrome - although I really don't like that thing. Thanks for your help!