It won't load https://qsurvey.mozilla.com/s3/FirefoxInput/ for the same reason, and now tells me that I blocked my own twitter account.

Way to go propeller beanies. At least Win10 has its own browser.

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

https://support.mozilla.org/en-US/kb/what-does-your-connection-is-not-secure-mean

Often, "Secure Connection Failed" means "Connection Failed (trying to load a secure page)". In other words, not a security problem, just a connection problem.

When FireFox suddenly blocks both Twitter and Mozilla pages with a new update, don't you figure there's something wrong with the update? If FireFox can't get this fixed, I'll be using MS Edge.

Now amazon.com is an "insecure site" to FireFox. And some guy wants me to hunt snipe to fix it.

i assume you have avast/avg installed on your system?

philipp said

i assume you have avast/avg installed on your system?

I have it installed and getting the same problem. Any idea on how to solve it?

I have AVG installed on my system, but I'm not having problems with the MS Edge browser. If this is a problem between Firefox and any other web site or A/V, this is Mozilla's problem to fix, not ours. Thunderbird has also gotten squirrely, changing the text/paragraph setting with each CR. I did the fix they suggested and it came back. Mozilla is not what it used to be.