If you want to help test this hypothesis, you can go to "about:config", search for "general.useragent.override", and set it to the string "Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Safari/537.36", then check if the website works correctly (probably clear the custom setting afterwards). thanks again
I'm guessing your version of FF behaves similarly to Webkit as described here: https://github.com/pac-dev/AmbientGarden/blob/master/Web/ver...
If you want to help test this hypothesis, you can go to "about:config", search for "general.useragent.override", and set it to the string "Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Safari/537.36", then check if the website works correctly (probably clear the custom setting afterwards). thanks again