How to Enable Legacy TLS Settings in Firefox, ListServ

Warnings

• Only follow these instructions if you have been asked to do so by IT.
• Only change these settings if website requires legacy TLS and you recognize the website as genuine.

Instructions

1. In the URL bar enter about:config 
2. Click Accept the Risk and Continue 
3. In the search bar enter security.tls.version.enable-deprecated 
4. Hit the toggle button to change the setting from false to true. 
5. Close and reopen Firefox.