I think maybe I might know what the problem is . However, I'm not sure yet how to fix it . to the left of the URL is a circle that I click & opened, then expanded it further till it showed the cookies selected. The working pc showed cookies activated for this application. The other pc has all cookies greyed out with no way of correcting.
Also the working URL has padlock icon (blank) which cannot be move to shortcut. I resolved this by using the URL on the corrupted pc. it worked in order to get the above info. When I logged off & then back on again, it went backed to the blank padlock icon. It seem now I need to get the cookies part of Firefox working. BTW, both machine do NOT have FF as default....