Read this Microsoft FAQ page on how to turn off these family features for accounts.
In Microsoft Windows accounts protected by Family Safety settings, secure connections on popular websites like Google, Facebook and YouTube might be intercepted and their certificates replaced by a certificate issued by Microsoft in order to filter and record search activity. Finally, reboot your system for the changes to take effect.įamily Safety settings in Windows accounts.In the Encrypted connections scanning section check the Do not scan encrypted connections option and confirm this change.Open the dashboard of your Kaspersky application.Otherwise, you can also disable the interception of secure connections:
The Kaspersky Downloads page includes "update" links that will install the latest version free of charge for users with a current subscription.
In ESET security products you can try to disable and re-enable SSL/TLS protocol filtering or generally disable the interception of secure connections as described in ESET’s support article.Īffected users of Kaspersky should upgrade to the most recent version of their security product, as Kaspersky 2019 and above contain mitigations for this problem.
You could try reinstalling it, which might trigger the software into placing its certificates into the Firefox trust store again. Third-party antivirus software can interfere with Firefox's secure connections.
In particular, the error code MOZILLA_PKIX_ERROR_MITM_DETECTED indicates that Firefox detected connection interception. The most common causes are security software scanning encrypted connections, or malware listening in and replacing legitimate website certificates with their own. If you get this problem on multiple unrelated HTTPS-sites, it indicates that something on your system or network is intercepting your connection and injecting certificates in a way that is not trusted by Firefox. The error occurs on multiple secure sites If you click the Advanced button on a "Warning: Potential Security Risk Ahead" error page and you see the error code SEC_ERROR_UNKNOWN_ISSUER or MOZILLA_PKIX_ERROR_MITM_DETECTED, it means that the provided certificate was issued by a certificate authority that is not known by Firefox and, therefore, cannot be trusted by default.