Troubleshoot security error codes on secure websites
Oct 16, 2025 · SEC_ERROR_UNKNOWN_ISSUER or MOZILLA_PKIX_ERROR_MITM_DETECTED: An untrusted authority issued the certificate. …
How can I eliminate the SEC_ERROR_UNKNOWN_ISSUER errors I …
Oct 25, 2018 · I just installed FF 63 on a 64-bit Windows 7 machine, and I'm getting SEC_ERROR_UNKNOWN_ISSUER errors at many, but not all, websites. Reaching the same …
Disable certificate verification - Mozilla Support
Nov 11, 2021 · I can't seem to disable the certificate verification on Mozilla Firefox. As you can see on the screenshot, the error code is SEC_ERROR_UNKNOWN_ISSUER.
Firefox and SSL: sec_error_unknown_issuer - Stack Overflow
Nov 9, 2008 · We had the same problem with a Comodo wildcard "positive ssl" cert. We are running our website using a squid-reverse SSL proxy and Firefox would keep complaining …
如何针对安全网站的错误码进行故障排除 | Firefox 帮助
Sep 6, 2025 · SEC_ERROR_UNKNOWN_ISSUER 或 MOZILLA_PKIX_ERROR_MITM_DETECTED：证书由不受信任的机构颁发。 …
Cómo solucionar el código de error …
SEC_ERROR_UNKNOWN_ISSUER o MOZILLA_PKIX_ERROR_MITM_DETECTED: Una autoridad no confiable emitió el certificado. ERROR_SELF_SIGNED_CERT: El sitio utiliza un …
Error code: SEC_ERROR_UNKNOWN_ISSUER on Linux - Mozilla …
Jun 23, 2020 · If you have never visited a server that has send this specific certificate (i.e. it isn't cached) then you get the SEC_ERROR_UNKNOWN_ISSUER error, otherwise the page will …
Beheben der Fehlercodes in der Meldung „Diese Verbindung ist …
Sep 8, 2025 · Dieser Artikel beschreibt die Bedeutung der häufigsten Fehlercodes – SEC_ERROR_UNKNOWN_ISSUER, MOZILLA_PKIX_ERROR_MITM_DETECTED und …
Régler les codes d’erreur de sécurité sur les sites web sécurisés
Découvrez ce que les codes d’erreur de sécurité de Firefox signifient et comment régler le problème en toute sécurité, dont les problèmes avec les antivirus, les réseaux et les certificats.
How to fix issue "Error code: SEC_ERROR_UNKNOWN_ISSUER" …
Jan 15, 2019 · There is no need to install JMeter Certificate in Windows system storage, just in browser. So, check that you have done every step: Remove all old certificates from browser …