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Firefox has started showing an untrustred site message, on every site I try to access, including firefox help. How do I stop this?

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Jeffrey Farrell
Jeffrey Farrell

Every site I visit, including my email accounts and your help screens themselves come up as untrusted, although I have been visiting most of them at least weekly for many years without problem. How can I remove this barrier as it is proving to be so time consuming that I may have to leave Firefox, although I do not wish to after so long

Every site I visit, including my email accounts and your help screens themselves come up as untrusted, although I have been visiting most of them at least weekly for many years without problem. How can I remove this barrier as it is proving to be so time consuming that I may have to leave Firefox, although I do not wish to after so long

Ausgewählte Lösung

This Connection is Untrusted is sometimes caused because the computer system clock is wrong. Check the time / date / time zone settings.

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FredMcD
FredMcD

Ausgewählte Lösung

This Connection is Untrusted is sometimes caused because the computer system clock is wrong. Check the time / date / time zone settings.

cor-el
cor-el
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You can check the connection settings.

If you do not need to use a proxy to connect to internet then try to select "No Proxy" if "Use the system proxy settings" or one of the others do not work properly.

See "Firefox connection settings":

Check 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.

You can retrieve the certificate and check details like who issued certificates and expiration dates of certificates.

  • Click the link at the bottom of the error page: "I Understand the Risks"

Let Firefox retrieve the certificate: "Add Exception" -> "Get Certificate".

  • Click the "View..." button and inspect the certificate and check who is the issuer of the certificate.

You can see more Details like intermediate certificates that are used in the Details pane.

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".

  • 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.
  • Note that it is not recommended to add a permanent exception in cases like this, so only use it to inspect the certificate.