What is JotForm?
JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
At JotForm, we want to make sure that you’re getting the online form builder help that you need. Our friendly customer support team is available 24/7.
We believe that if one user has a question, there could be more users who may have the same question. This is why many of our support forum threads are public and available to be searched and viewed. If you’d like help immediately, feel free to search for a similar question, or submit your question or concern.
Hope this information helps.
They open fine in Internet Explorer but not FireFox.
I've tested it with Firefox and it works fine.
I checked also your form/s using Firefox and it's working properly. I don't see any problem in your form. I suggest logout to your account, delete browser cache and cookies then log back in.