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

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

Echekwara usoro a. Biko jụọ ajụjụ ọhụrụ ma ọ bụrụ na ị chọrọ enyemaka.

error code: Mozilla_PKIX_Error_not_yet_valid_issuer_certificate?

  • 1 nzaghachinzaghachi
  • 1 nwere nsogbu anwere nsogbu a
  • 12 views
  • Nzaghachi ikpeazụ nke philipp

stuartbrown200
stuartbrown200
more options

when trying to open certain websites, I receive the error code above.

when I click on "Advanced"

Foxfire using HTTP Strict Transport Security may not connect to this site securely so it is not possible to add an exception for this certificate.

How do I override or delete this error code to open the desired website

when trying to open certain websites, I receive the error code above. when I click on "Advanced" Foxfire using HTTP Strict Transport Security may not connect to this site securely so it is not possible to add an exception for this certificate. How do I override or delete this error code to open the desired website

All Replies (1)

philipp
philipp
  • Moderator
more options

hi, please check that your system is set to right date, time & timezone! How to troubleshoot time related errors on secure websites