One of the first things I do on a new Firefox install is add a user-agent switcher and set it up to tell sites I am using chrome for exactly this reason.
Somehow we have gone back to the dark ages of web where sites complain unless you are using one specific browser.
It was the more technical minded people who spread the word and mindshare of browser choice back then to get us out of that mess, and now the same group has gotten us back into it worse than ever.
A quick (though not very user friendly) method to change Firefox's User-Agent string is to create a new about:config pref (string type) called "general.useragent.override" wit the new User-Agent string.
Somehow we have gone back to the dark ages of web where sites complain unless you are using one specific browser.
It was the more technical minded people who spread the word and mindshare of browser choice back then to get us out of that mess, and now the same group has gotten us back into it worse than ever.
I'll never understand how this happened.