Join the AMA (Ask Me Anything) with the Firefox leadership team to celebrate Firefox 20th anniversary and discuss Firefox’s future on Mozilla Connect. Mark your calendar on Thursday, November 14, 18:00 - 20:00 UTC!

Avatar for Username

Search Support

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.

Learn More

This thread was archived. Please ask a new question if you need help.

Version 65.0 blocks ALL websites

  • 2 replies
  • 2 have this problem
  • 1 view
  • Last reply by philipp

gwilterdink
gwilterdink
more options

Firefox just did an automatic update to version 65.0 (Firefox Quantum, 32 bit) and ALL of my websites are blocked with the message, "Your connection is not secure".

This is what I get back when I try to access Google: "The owner of www.google.com has configured their website improperly. To protect your information from being stolen, Firefox has not connected to this website."

This site uses HTTP Strict Transport Security (HSTS) to specify that Firefox may only connect to it securely. As a result, it is not possible to add an exception for this certificate.


Even your own website is stopped with this message: "The owner of qsurvey.mozilla.com has configured their website improperly. To protect your information from being stolen, Firefox has not connected to this website."

...and Firefox will NOT allow me to bypass this warning, making the browser useless. I'm using Chrome to send you this message.

Firefox just did an automatic update to version 65.0 (Firefox Quantum, 32 bit) and ALL of my websites are blocked with the message, "Your connection is not secure". This is what I get back when I try to access Google: "The owner of www.google.com has configured their website improperly. To protect your information from being stolen, Firefox has not connected to this website." This site uses HTTP Strict Transport Security (HSTS) to specify that Firefox may only connect to it securely. As a result, it is not possible to add an exception for this certificate. Even your own website is stopped with this message: "The owner of qsurvey.mozilla.com has configured their website improperly. To protect your information from being stolen, Firefox has not connected to this website." ...and Firefox will NOT allow me to bypass this warning, making the browser useless. I'm using Chrome to send you this message.

All Replies (2)

FredMcD
FredMcD
more options

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


  • 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

philipp
philipp
  • Moderator
more options

hi, this is likely your avast/avg security softare tampering with encrypted connections. please either try to reinstall your security software or else follow the more specific steps for it at How to troubleshoot security error codes on secure websites