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Inability of FireFox to verify security certificates.

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CharlieFoxtrot
CharlieFoxtrot
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The warning below shows up consistently on every attempt to access the web, whether directly or by link such as in an e-mail: This includes sites regularly accessed including Google and Mozilla.

This Connection is Untrusted 



         You have asked Firefox to connect

securely to support.mozilla.org, but we can't confirm that your connection is secure. 

         Normally, when you try to connect securely,

sites will present trusted identification to prove that you are going to the right place. However, this site's identity can't be verified. 


         What Should I Do?
         
           If you usually connect to

this site without problems, this error could mean that someone is trying to impersonate the site, and you shouldn't continue.

The warning below shows up consistently on every attempt to access the web, whether directly or by link such as in an e-mail: This includes sites regularly accessed including Google and Mozilla. This Connection is Untrusted You have asked Firefox to connect securely to support.mozilla.org, but we can't confirm that your connection is secure. Normally, when you try to connect securely, sites will present trusted identification to prove that you are going to the right place. However, this site's identity can't be verified. What Should I Do? If you usually connect to this site without problems, this error could mean that someone is trying to impersonate the site, and you shouldn't continue.

Toate răspunsurile (1)

cor-el
cor-el
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  • Top 10 Contributor
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Please Update to the latest Firefox 19.0.x version.

  • Help > About Firefox

The Firefox 4 version that you currently run is no longer supported with security updates

Check the date and time in the clock on your computer: (double) click the clock icon on the Windows Taskbar.

Check out why the site is untrusted (see the Technical details).

Some firewalls monitor secure (https) connections and send their own certificate instead of the website's certificate.

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.

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