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I get "This Connection is Untrusted" on almost every page

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So I had power outage and internet outage last night due to a thunderstorm last night. When I get up to turn everything on and check the internet, Firefox went completely mad!?!?

I keep getting "This Connection is Untrusted" on almost every page from Facebook, to YouTube, and almost every other site I tried. On top of that I keep getting a Opening pop up asking what should Firefox do with this file? Lastly if i do add an exception for that site, the page opens up, not sure if this is the right term, un-encoded? No pictures, plain text and links.

I have tried uninstalling and reinstalling, and that didn't work. http://imgur.com/a/hnjjI (mozilla wasn't uplaoding my screenshoots so I posted them)

So I had power outage and internet outage last night due to a thunderstorm last night. When I get up to turn everything on and check the internet, Firefox went completely mad!?!? I keep getting "This Connection is Untrusted" on almost every page from Facebook, to YouTube, and almost every other site I tried. On top of that I keep getting a Opening pop up asking what should Firefox do with this file? Lastly if i do add an exception for that site, the page opens up, not sure if this is the right term, un-encoded? No pictures, plain text and links. I have tried uninstalling and reinstalling, and that didn't work. http://imgur.com/a/hnjjI (mozilla wasn't uplaoding my screenshoots so I posted them)

Valgt løsning

You can check the date and time and time zone in the clock on your computer: (double) click the clock icon on the Windows Taskbar.

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 the intermediate certificates that are used in the Details tab.


Clear the cache and remove cookies only from websites that cause problems.

"Clear the Cache":

  • Firefox/Tools > Options > Advanced > Network > Cached Web Content: "Clear Now"

"Remove Cookies" from sites causing problems:

  • Firefox/Tools > Options > Privacy > "Use custom settings for history" > Cookies: "Show Cookies"
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Alle svar (4)

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hello, please try to refresh firefox and see if this can address the issue...

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Valgt løsning

You can check the date and time and time zone in the clock on your computer: (double) click the clock icon on the Windows Taskbar.

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 the intermediate certificates that are used in the Details tab.


Clear the cache and remove cookies only from websites that cause problems.

"Clear the Cache":

  • Firefox/Tools > Options > Advanced > Network > Cached Web Content: "Clear Now"

"Remove Cookies" from sites causing problems:

  • Firefox/Tools > Options > Privacy > "Use custom settings for history" > Cookies: "Show Cookies"

Ændret af cor-el den

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Tried that didn't work for me.

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I didn't think to view the certificate, the problem was my anti-virus software blocking everything.

Thank you.