We have installed a Comodo EV SSL on our server with the bundled RSA intermediate certificates. All works in IE and Chrome but Firefox throws up a warning. On inspecting via the server test we appear to have an incomplete chain. The extra download is
COMODO RSA Certification Authority
RSA 4096 bits / SHA384withRSA
However this certificate is installed on the server (IE and Chrome pick it up fine and show in the chain). I have restarted the website/IIS and the server but still no joy. Any pointers please?