HI, Separate Security Issue, please update your Flash 28.0 r0 Flash Player Version: 29.0.0.171 Current Version https://get.adobe.com/flashplayer/otherversions/ Step 1: Select Operating System Step 2: Select A Version (Firefox, . . . .) Note: Other software is offered in the download. <Windows Only>

If not updated to version 60.0.2 today please do Help --> About fixed : Connecting to a server that was recently upgraded to TLS 1.3 would result in a SSL_RX_MALFORMED_SERVER_HELLO error

What A/V & Firewall program are you using please :??

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

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

http://kb.mozillazine.org/Error_loading_websites

You can check security.ssl3.* and security.tls.* prefs on the about:config page and make sure they have the default and aren't user set (bold).

• security.tls.version.min
• security.tls.version.max
• 1 means TLS 1.0; 2 means TLS 1.1; 3 means TLS 1.2; 4 means TLS 1.3;

You can open the about:config page via the location/address bar. You can accept the warning and click "I accept the risk!" to continue.

• http://kb.mozillazine.org/about:config

Firefox no longer uses the SSL 3.0 protocol. The mininum is TLS 1.0. If you are trying to access a site that ONLY supports SSL 3.0, you may be out of luck with any browser from the past few years.

Yep the SSLv3 was disabled by default as of Firefox 34 and later.

https://blog.mozilla.org/security/2014/10/14/the-poodle-attack-and-the-end-of-ssl-3-0/