This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Avatar for Username

Caută ajutor

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Află mai multe

Acest fir de discuție a fost arhivat. Adresează o întrebare nouă dacă ai nevoie de ajutor.

Google "Did Not Connect: Potential Security Issue"

  • 6 răspunsuri
  • 3 au această problemă
  • 23 de vizualizări
  • Ultimul răspuns de FredMcD

lucasquiros93
lucasquiros93
more options

After the google outage a week ago I can't get into any google site. I asked a friend that also uses firefox and they can access them just fine, I can enter normally with other browsers, too.

Here's a transcript of the error page, if it helps:

Did Not Connect: Potential Security Issue

Firefox detected a potential security threat and did not continue to www.youtube.com because this website requires a secure connection.

What can you do about it?

www.youtube.com has a security policy called HTTP Strict Transport Security (HSTS), which means that Firefox can only connect to it securely. You can’t add an exception to visit this site.

The issue is most likely with the website, and there is nothing you can do to resolve it.

If you are on a corporate network or using anti-virus software, you can reach out to the support teams for assistance. You can also notify the website’s administrator about the problem.

After the google outage a week ago I can't get into any google site. I asked a friend that also uses firefox and they can access them just fine, I can enter normally with other browsers, too. Here's a transcript of the error page, if it helps: Did Not Connect: Potential Security Issue Firefox detected a potential security threat and did not continue to www.youtube.com because this website requires a secure connection. What can you do about it? www.youtube.com has a security policy called HTTP Strict Transport Security (HSTS), which means that Firefox can only connect to it securely. You can’t add an exception to visit this site. The issue is most likely with the website, and there is nothing you can do to resolve it. If you are on a corporate network or using anti-virus software, you can reach out to the support teams for assistance. You can also notify the website’s administrator about the problem.

Toate răspunsurile (6)

Daniel Ebenezer
Daniel Ebenezer
more options

MOZILLA_PKIX_ERROR_MITM_DETECTED 

   uses an invalid security certificate SSL_ERROR_BAD_CERT_DOMAIN
   configured their website improperly

How to troubleshoot the error code "SEC_ERROR_UNKNOWN_ISSUER" on secure websites

https://support.mozilla.org/en-US/kb/troubleshoot-SEC_ERROR_UNKNOWN_ISSUER

lucasquiros93
lucasquiros93 Deținătorul întrebării
more options

After looking into it more, I found that I had the exact same problem (and solution) that this reddit post had 7 months ago.

https://www.reddit.com/r/techsupport/comments/ghgtey/googlecom_sends_a_certificate_issued_by_digicert/

The problem was fixed by turning off proxy.

FredMcD
FredMcD
more options
  • MOZILLA_PKIX_ERROR_MITM_DETECTED
  • uses an invalid security certificate SSL_ERROR_BAD_CERT_DOMAIN
  • configured their website improperly

How to troubleshoot the error code "SEC_ERROR_UNKNOWN_ISSUER" on secure websites https://support.mozilla.org/en-US/kb/troubleshoot-SEC_ERROR_UNKNOWN_ISSUER


There is security software like Avast, Kaspersky, BitDefender and ESET that intercept secure connection certificates and send their own.

https://support.mozilla.org/en-US/kb/firefox-cant-load-websites-other-browsers-can

https://support.mozilla.org/en-US/kb/firefox-and-other-browsers-cant-load-websites

https://support.mozilla.org/en-US/kb/secure-connection-failed-error-message

https://support.mozilla.org/en-US/kb/connection-untrusted-error-message

Websites don't load - troubleshoot and fix error messages

http://kb.mozillazine.org/Error_loading_websites

What do the security warning codes mean

dhmilton3
dhmilton3
more options

This helps me HTis MOZILLA_PKIX_ERROR_MITM_DETECTED https://appuals.com/mozilla-pkix-error-mitm-detected/

dhmilton3
dhmilton3
more options

https://appuals.com/mozilla-pkix-error-mitm-detected/

MOZILLA_PKIX_ERROR_MITM_DETECTED

FredMcD
FredMcD
more options

Last reply by dhmilton3 2 hours ago

Sorry, current forum security sometimes delays the posting of messages. And in turn, we are not notified of those posts.