I am a Realtor and need to upload PDF files to the website www.dotloop.com. This site only allows uploads of PDF files. When I attempt to upload a PDF the website returns an error message that says "You Can Only Upload PDF Files". When I call the website support they say it is a problem with Firefox mis-identifying the file type to the website. I attempted to unistall firefox and reinstall (suggested by .dotloop support) but this did not fix the problem. Is there a setting or some update to fix this?