The site is a financial site, Fidelity.com, banking basically, and it wouldn't allow me to input anything. Good thing I was on the phone at the same time with the representative, and he was the one guiding me into the process, so when I couldn't input anything I told him I was using FireFox and it was newly installed. I changed to Safari right away and proceeded to complete the whole process. I guess maybe FireFox is not "accepted" by everybody yet? Just a wild guess...