Cox Webmail Doesn't Work with Any Browsers

I have Windows 10 and cannot use Cox Webmail with any of these browsers, Edge, Explorer, Chrome or Firefox.  If I try to use enhanced webmail, I get an error message telling me that I need an updated version of Adobe Flash and if I try to use Classic webmail, it will not work in HTML mode.  I have to use "Plain" mode, but then when I do that, the original message is not included if I reply to an email.  And why are you requiring users to use Adobe Flash that is not only being killed off in 2020, but also poses security risks to the user?

Please tell me how I am supposed to use my Cox webmail account other than just always using my iPhone?  This is really frustrating.