Looks like the site started checking and enforcing user agents. Seems as there is no functionality problem as spoofing it, has everything start working.
On the latest version of Firefox.
" Unfortunately, your browser is unsupported. Please switch to a supported browser to view rich content, log in and reply."
Trying to attach a screen capture but it errors on upload 
This is blocking any site interaction as it removed the top banner, and reply button.