Fix Firefox Error Certificate Your Connection is not Secure appear
Firefox Your connection is not secure
Firefox problem Certificate error
I try many option, from tips Mozilla website.
But no one can solve problem
Clear Cache, not help to fix Firefox program in Windows 7
Even uninstall and back install Firefox
Update new version until Firefox 84.
Error show in a few website.
But I found one option during Uninstall.
Uninstall Firefox from Control Panel
You can see the other option, for Refresh.
Try that.
Refresh option, still keep your Bookmark Firefox link.
But all cache and cookies will clean up.
Make sure, you still remember login password.
The other option
You can disable all addons.
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