I held off on Windows 10 for as long as I could until Adobe, and therefore my job, required it. Now this nonsense. I hope this isn't the start of them joining on the web DRM bandwagon.
The NHS' virtual appointment service in the UK doesn't support Firefox either, only Chrome, Safari and Edge. The dark days of "please view this website in Internet Explorer 6" are creeping closer to the present again. I hate the modern internet.