@downey It isn't that easy, particularly in medical applications. An "out-of-date browser" error message usually means that the browser is so very old that there is no common encryption algorithm between the server and the browser (the latter only supporting encryptions which are known to be broken).
I've recently seen the opposite problem: a printserver from 2019 that couldn't be configured using recent firefox. I had to go to about:config and downgrade security.tls.version.fallback.limit
and security.version.min
@ralf_muschall @downey This might be a valid reason. But then they should list which feature is not supported, why it is absolute necessary (like you mention e.g. encryption in health care or banking) and which versions of the mentioned browsers are supported.