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!

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

SEC_ERROR_UNKNOWN_ISSUER for google services

  • 1 reply
  • 1 has this problem
  • 7 views
  • Last reply by FredMcD

more options

whenever I try to connect to google I get that error message. Same goes for google services like captcha, youtube etc. I tried with different browsers and all were working just fine

whenever I try to connect to google I get that error message. Same goes for google services like captcha, youtube etc. I tried with different browsers and all were working just fine

All Replies (1)

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