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Firefox will not run properly now

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  • 1 has this problem
  • 4 views
  • Last reply by cor-el

KSauce86
KSauce86
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I really need help getting my Firefox to run properly. Earlier this evening I downloaded the epub reader addon from the Firefox addon website. After that I noticed my Firefox was using yahoo as the search engine instead of Google. I've tried the obvious set it to Google but it kept going to Yahoo. I also uninstalled the addon but it still kept searching on Yahoo. So I searched for solutions online. Then I tried the Help>Troubleshooting Information Restart Firefox. This when all the problems began.

Now every time I go to Google.com or search on the Google toolbar I get the This Connection is Untrusted message Screenshot: http://imgur.com/BttGmGU Also when I go to certain websites like the mozilla firefox add on website it will not load properly Screenshot: http://imgur.com/oIz0XgE

Can anybody help me with this? I've tried the obvious options like uninstalling and reinstalling but my Firefox refuses to perform normally. Also I still have the old Firefox Data. Is there a way I can restore that data?

I really need help getting my Firefox to run properly. Earlier this evening I downloaded the epub reader addon from the Firefox addon website. After that I noticed my Firefox was using yahoo as the search engine instead of Google. I've tried the obvious set it to Google but it kept going to Yahoo. I also uninstalled the addon but it still kept searching on Yahoo. So I searched for solutions online. Then I tried the Help>Troubleshooting Information Restart Firefox. This when all the problems began. Now every time I go to Google.com or search on the Google toolbar I get the This Connection is Untrusted message Screenshot: http://imgur.com/BttGmGU Also when I go to certain websites like the mozilla firefox add on website it will not load properly Screenshot: http://imgur.com/oIz0XgE Can anybody help me with this? I've tried the obvious options like uninstalling and reinstalling but my Firefox refuses to perform normally. Also I still have the old Firefox Data. Is there a way I can restore that data?

All Replies (1)

cor-el
cor-el
  • Moderator
  • Top 10 Contributor
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Check out why the site is untrusted (click "Technical Details to expand that section) and if this is caused by a missing intermediate certificate 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.