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1. #FIREFOX ISSUER CERTIFICATE IS UNKNOWN INSTALL#
2. #FIREFOX ISSUER CERTIFICATE IS UNKNOWN CODE#
3. #FIREFOX ISSUER CERTIFICATE IS UNKNOWN WINDOWS#

*Click the "View." button and inspect the certificate and check who is the issuer of the certificate. *Click the link at the bottom of the error page: "I Understand the Risks"

#FIREFOX ISSUER CERTIFICATE IS UNKNOWN INSTALL#

Note that some firewalls monitor (secure) connections and that programs like Sendori or FiddlerRoot can intercept connections and send their own certificate instead of the website's certificate.Ĭheck out why the site is untrusted and click "Technical Details to expand this section.If the certificate is not trusted because no issuer chain was provided (sec_error_unknown_issuer) then see if you can install this intermediate certificate from another source. If "I Understand the Risks" is missing then this page may be opened in an (i)frame and in that case try the right-click context menu and use "This Frame: Open Frame in New Tab". You can see more Details like intermediate certificates that are used in the Details pane.

If the certificate is not trusted because no issuer chain was provided (sec_error_unknown_issuer) then see if you can install this intermediate certificate from another source.

#FIREFOX ISSUER CERTIFICATE IS UNKNOWN WINDOWS#

In the search box at the top of the page, type ''proxy'' and Firefox should filter to the "Settings" button, which you can click.Did you check who is the issuer of the certificate?Ĭheck the date and time in the clock on your computer: (double) click the clock icon on the Windows Taskbar.Ĭheck out why the site is untrusted and click "Technical Details to expand this section. * Any system: type or paste '''about:preferences''' into the address bar and press Enter/Return to load it * Linux: "3-bar" menu button (or Edit menu) > Preferences * Mac: "3-bar" menu button (or Firefox menu) > Preferences * Windows: "3-bar" menu button (or Tools menu) > Options Read this answer in context 👍 2 All Replies (14) "Auto-detect" can lead to a flaky connection. The default of "Use system proxy settings" piggybacks on your Windows/IE "LAN" setting. In the search box at the top of the page, type proxy and Firefox should filter to the "Settings" button, which you can click.

As a test, you can change your connection setting: Several users have reported theirs switching to a fake Digicert-issued certificate, which seems to be associated with a proxy. If you click View Certificate, does the Issuer Name section list I don't think you can Accept and Continue on Google sites due to HSTS. Firefox does not trust because its certificate issuer is unknown, the certificate is self-signed, or the server is not sending the correct intermediate certificates. Websites prove their identity via certificates. Someone could be trying to impersonate the site and you should not continue. You can also notify the website’s administrator about the problem. If you are on a corporate network or using anti-virus software, you can reach out to the support teams for assistance. Symantec was completely distrusted last Fall. Specifically, it’s usually a Symantec Legacy certificate at fault.

#FIREFOX ISSUER CERTIFICATE IS UNKNOWN CODE#

The issue is most likely with the website, and there is nothing you can do to resolve it. The error code SECERRORUNKNOWNISSUER in Firefox refers to one of two possible scenarios: The certificate was issued by an untrusted CA or Somehow, the issuing CA’s root was deleted from the root store. You can’t add an exception to visit this site. Has a security policy called HTTP Strict Transport Security (HSTS), which means that Firefox can only connect to it securely. Showing below message once i enter ĭid Not Connect: Potential Security Issueįirefox detected a potential security threat and did not continue to because this website requires a secure connection. Since yesterday 2-Feb-21, i cant open any Google sites (Search engine, Photos, Drive, mails etc)! I have no idea how this happened.