Mozilla Firefox – Steps to Require TLS Support

Mozilla Firefox – TLS 1.1+ Support

1. In the address bar, type “about:config” and hit enter.

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2. In the “Search” field, enter “tls”. Find and double-click the entry for “security.tls.version.min”.

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3. Set the integer value to “2” to force a minimum protocol of TLS 1.1 (entering “3” would force TLS 1.2).

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4. This configuration will now show the new value and will take effect immediately (don’t forget to clear your cache).

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Source: https://www.ssl.com/how-to/turn-off-ssl-3-0-and-tls-1-0-in-your-browser/#/FF