Identification error is often caused when you land from other sites but this issue should not persist when you try to visit the site directly.
Unknown Issuer is actually an additional layer of security that is mostly enforced by the security software.
In order to preserve user security, once Flash is no longer supported by Adobe security patches, no version of Firefox will load the plugin.
As part of improving Firefox performance and security this year, Firefox users will choose which sites may run the Flash plugin.
Starting next month, users will choose which websites are able to run the Flash plugin.
Flash will be disabled by default for most users in 2019, and only users running the Firefox Extended Support Release (ESR) will be able to continue using Flash through the final end-of-life at the end of 2020.
Usually, the URL begins with “https://” and the certificate provided by the website provides sufficient evidence that the encryption is strong enough.
If the certificate of the site cannot be validated you will be given an option to load the site with an exception.
Be forewarned that legitimate sites will not ask you to bypass the certificate and if they do it’s better to check if it’s a phishing attempt or a fake site altogether.
However, if you are trying to access an intranet network and you get this message you may ignore it without giving it a much of a thought.
The Corrupted certificate file error often crops up when the file in your profile folder, the one which stores your cert8certificates has become corrupted.