First step: Install all Microsoft updates.
Next: Install Firefox 19
Go to my OpenVPN-AS server's IP, log on (connect), get redirecte to "please download and install openvpn-connect". Did that.
Can not connect through the web interface on FF19.
IE 32-bit works. IE64bit works. Google Chrome works. FF19 is a no-go. It keeps insisting on wanting me to download and install OpenVPN Connect.
This does not happen on machines that had old(er) versions of FF installed and that got upgraded to FF19.
While I realize that this is ultimately a Firefox problem, I'd love to know if there's some fix or workaround that's known to someone here, because, well, I don't think this issue would be all that important to Mozilla

Thanks for the help/hints.
Frank