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

Avatar for Username

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 archived. Please ask a new question if you need help.

"connection is not secure" happened only on firefox download page

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

d104601
d104601

Hi. I got "your connection is not secure" error only when I try to download new firefox update. I tried with other browsers(Edge, Chrome, etc) and got same error. Anyone has solution for this?

Hi. I got "your connection is not secure" error only when I try to download new firefox update. I tried with other browsers(Edge, Chrome, etc) and got same error. Anyone has solution for this?

All Replies (2)

FredMcD
FredMcD

There is security software like Avast, Kaspersky, BitDefender and ESET that intercept secure connection certificates and send their own.

https://support.mozilla.org/en-US/kb/firefox-cant-load-websites-other-browsers-can

https://support.mozilla.org/en-US/kb/firefox-and-other-browsers-cant-load-websites

https://support.mozilla.org/en-US/kb/secure-connection-failed-error-message

https://support.mozilla.org/en-US/kb/connection-untrusted-error-message

Websites don't load - troubleshoot and fix error messages

http://kb.mozillazine.org/Error_loading_websites

cor-el
cor-el
  • Moderator
  • Top 10 Contributor

Boot the computer in Windows Safe mode with network support to see if that has effect in case security software is causing problems.