It is possible to make the website think I am using chrome and windows, but I don't want to get in trouble for cheating. Even if I use degoogle Chromium it still won't allow me because I use Linux.
Will request their IT Department to consider accepting/ testing end users who use Linux and or Firefox. Got to be an rational reason why this organization have ended up with this decision/ limitations.
Edit 1: Done :)
If ChromeOS is supported, you should be fine. ChromeOS is basically Gentoo with Chrome as the UI for everything. This looks more like a "this is what we tested this site on" than "you absolutely need those specs to do what you have to do".
I just used government sites that recommend Internet Explorer 11 just fine on Firefox. Maybe use Chromium for safety and you should be good. Spoof user agent as needed.
E: ugh stupid "hot" algorithm digging stuff from months ago