security reasons. since you can't controll what other people are sending to you, you always want to use the most recent as-bug-free-as-possibly version, see htt

security reasons. since you can't controll what other people are sending to you, you always want to use the most recent as-bug-free-as-possibly version, see https://www.mozilla.org/en-US/security/known-vulnerabilities/thunderbird/ https://www.mozilla.org/en-US/security/known-vulnerabilities...