Your Connection is not secure is one of the common problems on Firefox & in order to troubleshoot, we need to understand the type of Firefox connection errors.

After following the solutions mentioned, you will successfully fix PR_CONNECT_RESET_ERROR On Mozilla Firefox in Windows 10.

How to fix Secure Connection Failed error in Mozilla Firefox? When you visit a website, Firefox cross-checks this attempt to make sure that the website certificate and connection method are ...

The "opportunistic encryption" feature added to Firefox last week has been disabled to fix a critical security bug that allowed malicious websites to bypass HTTPS protections, Mozilla officials ...