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

Este fío arquivouse. Faga unha nova pregunta se precisa axuda.

strict transport security

candylove21
candylove21
more options

I am currently having this issue and i am unable to resolve it


The owner of apps.facebook.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 only connect to it securely. As a result, it is not possible to add an exception for this certificate.

Learn more…

Report errors like this to help Mozilla identify misconfigured sites

apps.facebook.com uses an invalid security certificate.

The certificate is not trusted because it is self-signed. The certificate is only valid for Daniel The certificate expired on Wednesday, September 06, 2006 7:31 PM. The current time is Friday, July 15, 2016 1:15 PM.

Error code: SEC_ERROR_UNKNOWN_ISSUER

I am currently having this issue and i am unable to resolve it The owner of apps.facebook.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 only connect to it securely. As a result, it is not possible to add an exception for this certificate. Learn more… Report errors like this to help Mozilla identify misconfigured sites apps.facebook.com uses an invalid security certificate. The certificate is not trusted because it is self-signed. The certificate is only valid for Daniel The certificate expired on Wednesday, September 06, 2006 7:31 PM. The current time is Friday, July 15, 2016 1:15 PM. Error code: SEC_ERROR_UNKNOWN_ISSUER

Chosen solution

candylove21 said

The certificate is only valid for Daniel
The certificate expired on Wednesday, September 06, 2006 7:31 PM. The current time is Friday, July 15, 2016 1:15 PM.

Error code: SEC_ERROR_UNKNOWN_ISSUER

Hmm, who is Daniel?

Do you get certificate errors on any other mainstream websites, or only on this particular Facebook app? You should never need to make an exception for a well-run site.

We do have a support article related to that error code. In case you didn't see it before: How to troubleshoot security error codes on secure websites.

Does anything there help? If not, we can try some additional troubleshooting.

Ler a resposta no contexto 👍 3

All Replies (1)

jscher2000 - Support Volunteer
jscher2000 - Support Volunteer
  • Top 10 Contributor
more options

Chosen Solution

candylove21 said

The certificate is only valid for Daniel
The certificate expired on Wednesday, September 06, 2006 7:31 PM. The current time is Friday, July 15, 2016 1:15 PM.

Error code: SEC_ERROR_UNKNOWN_ISSUER

Hmm, who is Daniel?

Do you get certificate errors on any other mainstream websites, or only on this particular Facebook app? You should never need to make an exception for a well-run site.

We do have a support article related to that error code. In case you didn't see it before: How to troubleshoot security error codes on secure websites.

Does anything there help? If not, we can try some additional troubleshooting.