Hi Joshua - Thanks for mentioning browser settings (security zones) - It was key in getting ours working with (first) IE, Edge, and Chrome. This video was really helpful, but doesn't cover it as I recall (maybe its implied and I'm lacking).
Anyway, Thanks! So, Firefox remains an issue for us though. It appears accepting AD credentials is somehow tied to Firefox cached site data or browsing history. Is there a Firefox config similar to IE internet options>Security> zones?
Thanks
-Nick