Hello,
I have made a couple of Portals now, and I consistently find that it works perfect in Edge and Chrome, but in Firefox the forms don't submit and fetchxml doesn't get it's results back correctly. The fetchxml requests in Firefox give a 302 or 303 even when ran without add-ons.
If it were for purely internal Portals it wouldn't be a big deal just tell people using it not to use Firefox, but occasionally the Portals are targeted at the general public.
Is there a solution or workaround for this? Maybe a site setting that I haven't quite found yet that needs to be configured?