Firefox says I must have Java script to open my iCloud app on my Windows 7 PC. It worked fine before when using Explorer. How do I get it to work?

Firefox says I must have Java script to open my iCloud app on Windows 7. Opened fine in Explorer 11 before the Microsoft debacle and I switched to Firefox. Now I get a warning under the add apps section in Firefox saying I don't need Java script toolkit to get Java script to work again. I don't even have Java script on my system, just a small portion according to Windows Programs that allows apps to run. Can anyone tell me how to get my iCloud app working again? Do I have to uninstall and reinstall and if so will this impact my iPad or iPhone?

Thanks for any help you can provide.