We recently renewed our wildcard certificate, however 72 hours after the re-key was done to get a new Private Key, we started getting this error and similar ones on other browsers, this seemed to clear ok on other browsers except for Firefox. We had further issues with our website and the Cert was re-keyed again, downloaded and installed based on Apache and that seems to have resolved it again, however when trying to access our cloud based Mitel console it is still throwing this error up but it is working fine in all other browsers. I have cleared Cache, refreshed Firefox and deleted the cache9b database file all to no success. Not sure why this is causing so many problems. Anyone out there that can offer any assistance? Many thanks Barry
There is security software like Avast, Kaspersky, BitDefender and ESET that intercept secure connections and send their own certificate.
Turns out that by disabling and re-enabing 'Query OCSP responder servers to confirm the current validity of certificates' appears to have resolved the issue.
That was very good work. Well done. Please flag your last post as Solved Problem so others will know.