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.

Any idea how I fix this? It comes up often.

  • 6 replies
  • 3 have this problem
  • 133 views
  • Last reply by James

debnkev
debnkev
more options

I just downloaded Quantum but can't do much as I keep getting this message.

accounts.firefox.com uses an invalid security certificate. The certificate is not trusted because the issuer certificate is unknown. The server might not be sending the appropriate intermediate certificates. An additional root certificate may need to be imported. Error code: SEC_ERROR_UNKNOWN_ISSUER

When I click advanced, I get the following:

https://accounts.firefox.com/signup?service=sync&context=fx_desktop_v3&entrypoint=uitour&utm_campaign=page+referral+-+not+part+of+a+campaign&utm_content=%2Ffirefox%2Ffeatures%2Fsync%2F

Peer’s Certificate issuer is not recognized.

HTTP Strict Transport Security: true HTTP Public Key Pinning: true

Certificate chain:

Any assistance would be appreciated

I just downloaded Quantum but can't do much as I keep getting this message. accounts.firefox.com uses an invalid security certificate. The certificate is not trusted because the issuer certificate is unknown. The server might not be sending the appropriate intermediate certificates. An additional root certificate may need to be imported. Error code: SEC_ERROR_UNKNOWN_ISSUER When I click advanced, I get the following: https://accounts.firefox.com/signup?service=sync&context=fx_desktop_v3&entrypoint=uitour&utm_campaign=page+referral+-+not+part+of+a+campaign&utm_content=%2Ffirefox%2Ffeatures%2Fsync%2F Peer’s Certificate issuer is not recognized. HTTP Strict Transport Security: true HTTP Public Key Pinning: true Certificate chain: Any assistance would be appreciated

Chosen solution

You can click the "Advanced" button to expand this section and show extra details. If the certificate is not trusted (SEC_ERROR_UNKNOWN_ISSUER) then click the blue error message to expand this section and show the certificate chain. You can click "Copy text to clipboard" and paste this base64 encoded certificate chain text in a reply. That will allow us to details like the issuer of the certificate.

  • always be cautious when you get an 'Untrusted' error message
  • never create a permanent exception without investigating the cause and only use this to inspect the certificate
Read this answer in context 👍 1

All Replies (6)

James
James
  • Top 25 Contributor
  • Moderator
more options

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

debnkev
debnkev Question owner
more options

My knowledge of these sorts of things is very limited so please excuse me if I'm misunderstanding this.

The link above states that the owner of the website that I was trying to access has configured it improperly. I use Kaspersky, so it appears to offer workarounds within Kaspersky to still access the site.

The website I'm trying to access though is https://accounts.firefox.com/ Shouldn't the Firefox site be configured properly?

WestEnd
WestEnd
more options

I think Kaspersky is part of the cause here. I run FF58x64 with Defender and Windows Firewall and have no issue logging into my FF account.

cor-el
cor-el
  • Moderator
  • Top 10 Contributor
more options

Chosen Solution

You can click the "Advanced" button to expand this section and show extra details. If the certificate is not trusted (SEC_ERROR_UNKNOWN_ISSUER) then click the blue error message to expand this section and show the certificate chain. You can click "Copy text to clipboard" and paste this base64 encoded certificate chain text in a reply. That will allow us to details like the issuer of the certificate.

  • always be cautious when you get an 'Untrusted' error message
  • never create a permanent exception without investigating the cause and only use this to inspect the certificate
debnkev
debnkev Question owner
more options

No idea what happened, but when I tried to access the site this morning, it went through without any difficulty. Thanks for your replies!

James
James
  • Top 25 Contributor
  • Moderator
more options

debnkev said

The website I'm trying to access though is https://accounts.firefox.com/ Shouldn't the Firefox site be configured properly?

The Mozilla site is configured properly, just that antivirus clients such as Kaspersky can insert their own certificate in their attempt at keeping you safe only to instead cause this SEC_ERROR_UNKNOWN_ISSUER error. This feature antivirus clients should be disabled by default overall.