And I have been a advocate of firefox for many years.
I have even turned off the windows firewall and trend micro internet security with no success.
So I have resulted to using microsoft edge more than firefox. currently with no issues. Other than I use firefox on occasion because I like the element inspector better.
What is your Enhanced Tracking Protection level set to in Firefox (in options/security)? I think that feature may be what is stopping form variables from being passed between pages, as submitting content between pages acts like a tracker would.
