Today I suddenly started receiving the error code: SEC_ERROR_REVOKED_CERTIFICATE on a secure authentication page that was working until a few hours earlier, belonging to a major national bank. https://www.ssllabs.com/ssltest/ cannot reach that page, other SSL checking sites report variable results (some say one cert in the chain has expired after a CRL, others say all is OK) The same page/site works flawlessly on Chrome. Firefox incompatibility with popular portals is a growing trend unfortunately. After a little digging with developer tools, it comes out the OCSP query reports the REVOKED_CERTIFICATE error. Disabling the "Query OCSP [..]" option in Firefox that website starts working fine again. Now, I would like to still keep using the OCSP queries ON, and I definitely want to keep using Firefox for everything. My question is: when a portal or website is found to be broken with Firefox (with default settings), with a root cause found like in this case, how can it be reported? Having a clear report path would be useful to try to make the browser more compatible (in this case : was this a bug? Some wrong information on OCSP responders? Some mess caused by the website mantainers?)