Why are you commenting if you don’t know what Apple Business Manager even is? Seriously, you have no knowledge of this site. Yet you are contesting my claims like your salary depends on it. Apple Business Manager is a way to enroll Apple Devices into a Mobile Device Management system. You have tonuse this or automated enrollment from your cell carrier to get iPhones into a manageable state. Additionally, without automated carrier enrollment you must use a Mac with Apple Configurator 2 on it to prepare the Apple Devices for enrollment. It all works on Firefox
If you tell me your site needs chromium to work, and then I change my user agent string and it works on my firefox browser that is suspect. There are thousands of reasons to hate Google, but this is also one of them. Apple didn’t make Chromium, and if it works on Firefox 100% why are you pushing Firefox users to a different browser?
You may find that acceptable, but I don’t. Thats just all there is to it.