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Every website that I try to access, I get this mesage ''This Connection Is Untrusted". Please advise.

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Every website that I try to access, I get this mesage This Connection Is Untrusted". I tried to add exceptions, but that didn't work.

Every website that I try to access, I get this mesage ''This Connection Is Untrusted". I tried to add exceptions, but that didn't work.

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Hello, This is generally not a good thing if you are seeing this message for all websites. Can you please check if you are seeing this issue if you open the browser in Safe Mode (instructions below).

Also, request you to scan your computer for any malware to ensure that there is no issue with some malicious software running on it.


Safe Mode

Try Firefox Safe Mode to see if the problem goes away. Safe Mode is a troubleshooting mode, which disables most add-ons.

(If you're not using it, switch to the Default theme.)

  • On Windows you can open Firefox 4.0+ in Safe Mode by holding the Shift key when you open the Firefox desktop or Start menu shortcut.
  • Or open the Help menu and click on the Restart with Add-ons Disabled... menu item while Firefox is running.

FirefoxSafeMode

Once you get the pop-up, just select "'Start in Safe Mode" Safe Mode Fx 15 - Win

If the issue is not present in Firefox Safe Mode, your problem is probably caused by an extension, and you need to figure out which one. Please follow the Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems article for that.

To exit the Firefox Safe Mode, just close Firefox and wait a few seconds before opening Firefox for normal use again.


Malware scan

Sometimes a problem with Firefox may be a result of malware installed on your computer, that you may not be aware of.

You can try these free programs to scan for malware, which work with your existing antivirus software:

Microsoft Security Essentials is a good permanent antivirus for Windows 7/Vista/XP if you don't already have one.

Further information can be found in the Troubleshoot Firefox issues caused by malware article.

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Hi,

I tried the Firefox Safe Mode and used the MS Safety Scanner. My PC is not infected, but the problem This Connection is Untrusted" still exists. I only have this problem with Firefox and not other browsers. Please advise. Thanks

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In order to be able to find the correct solution to your problem, we require some more non-personal information from you. Please do the following:

  • Click the Firefox button at the top left, then click the Help menu and select Troubleshooting Information from the submenu. If you don't have a Firefox button, click the Help menu at the top and select Troubleshooting Information from the menu.

Now, a new tab containing your troubleshooting information should open.

  • At the top of the page, you should see a button that says "Copy text to clipboard". Click it.
  • Now, go back to your forum post and click inside the reply box. Press Ctrl+V to paste all the information you copied into the forum post.

If you need further information about the Troubleshooting information page, please read the article Use the Troubleshooting Information page to help fix Firefox issues.

Also, please check that the machine's time and date are set accurately and please confirm that you have checked the instructions in this SUMO article "This Connection is Untrusted" error message appears - What to do

gnittala দ্বারা পরিমিত

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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 (click "Technical Details to expand that section).

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 Fiddler (FiddlerRoot) can intercept connections and send their own certificate instead of the website's certificate.

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I already tried what you suggested, but it didn't work. Thanks.

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Who issued the certificate that is used?


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":