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.