<blockquote> Will I still have access to my Enigmail e-mails whe I install the latest TB update? </blockquote> The short answer is 'yes'. As of TB78 OpenPGP is built into Thunderbird. Read the article to understand the differences, and the migration process. https://wiki.mozilla.org/Thunderbird:OpenPGP:Migration-From-Enigmail It is recommended to set a master/primary password to protect your private key(s). https://www.ghacks.net/2020/12/07/you-need-to-use-a-master-password-in-thunderbird-if-you-use-openpgp/