Windows 10 reached EOS (end of support) on October 14, 2025. If you are on Windows 10, see this article.

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

This thread was closed and archived. Please ask a new question if you need help.

Secure Connection Failed

  • 2 replies
  • 1 has this problem
  • 12 views
  • Last reply by cor-el

I have two computers. On one I have no issues with Firefox. The other computer I have a major problem with "Secure Connection Failed" - I cannot open sites like CNN, Yahoo Mail, etc. As I have looked into this it seems this is a big Firefox issue. What advise can you provide to make this nightmare go away. I really like Firefox and I don't want to give it up. I have tried the "ABOUT:CONFIG" True/False solution and that did not work. PLEASE tell me there is a SIMPLE solution to this issue.

Don [email removed from public]

I have two computers. On one I have no issues with Firefox. The other computer I have a major problem with "Secure Connection Failed" - I cannot open sites like CNN, Yahoo Mail, etc. As I have looked into this it seems this is a big Firefox issue. What advise can you provide to make this nightmare go away. I really like Firefox and I don't want to give it up. I have tried the "ABOUT:CONFIG" True/False solution and that did not work. PLEASE tell me there is a SIMPLE solution to this issue. Don [email removed from public]

Modified by James

All Replies (3)

Please explain the problem in detail. What happens? What is/are the exact error message(s) ?


Make sure you are not blocking content.

https://support.mozilla.org/en-US/kb/enhanced-tracking-protection-firefox-desktop also see https://blog.mozilla.org/security/2021/03/23/introducing-smartblock/

https://support.mozilla.org/en-US/kb/smartblock-enhanced-tracking-protection


Diagnose Firefox issues using Troubleshoot(Safe) Mode {web link}

A small dialog should appear. Click Start In Troubleshoot(Safe) Mode (not Refresh). Is the problem still there?


Many site issues can be caused by corrupt cookies or cache.

Warning ! ! This will log you out of sites you're logged in to. You may also lose any settings for that website.

You can check the connection settings.

  • Settings -> General -> Network: 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":

You can do a malware scan just to be sure.

This question has been locked because the original author has deleted their account. While you can no longer post new replies, the existing content remains available for reference.