I have used cloudflare ssl certificates for years, and have set them up for several domains. The certificate shows domain.com and *.domain.com as it should correctly, the certificate and key were obtained from the origin tab in SSL/TLS from the cloudflare interface, and installed correctly.
The cache has been cleared on cloudflare and browser.
Someone could be trying to impersonate the site and you should not continue.
Websites prove their identity via certificates. Firefox does not trust green.domain.com because its certificate issuer is unknown, the certificate is self-signed, or the server is not sending the correct intermediate certificates.
Error code: SEC_ERROR_UNKNOWN_ISSUER
Whats the problem?
Ok this forums is broken so I cant edit the post which replied to the user who helped me, it pops of a “link not found” error.
So I will post the solution here. It was not set as proxied in the CF panel. Yesterday it failed regardless of proxied or not, but today firefox marks it safe when proxied.