Thunderbird is a free and open source cross-platform email client, personal information manager, news client, RSS and chat client developed by the Mozilla Foundation. The project strategy was originally modeled on the Mozilla Firefox web browser.

On January 28, 2020, the Mozilla Foundation announced that the project will henceforth be run by a new wholly owned subsidiary, MZLA Technologies, to explore offering previously unattainable products and services, collected through partnerships and non-charitable donations income.

Thunderbird 102.2 is released with the following updates:

System Requirements

• Windows: Windows 7 or later
• Mac: macOS 10.12 or later
• Linux: GTK+ 3.14 or later

new function

• Added configuration setting to disable OpenPGP “encryption is possible” alertmail.openpgp.remind_encryption_possible

Variety

• Thunderbird on macOS now prompts for a master password on startup if a master password is set
• Thunderbird will no longer provide services for importing incomplete OpenPGP keys
• Selecting or deselecting a dictionary in the spelling toolbar button will no longer close the menu immediately; making dictionary changes through the editor’s context menu will continue to close the context menu
• Contact address lines are now adjusted to appear in the expected order

repair

• Performance improvements when Thunderbird starts
• ALT+<numpad digits> Keystroke events are intercepted by Spaces Toolbar, preventing special characters from being entered on Windows
• Search on attachment status does not work in message search dialog
• Repairing an IMAP folder in offline mode deletes the local copy of the folder
• POP3 mail download progress bar does not display
• POP Fetch headers only Mode does not work for some server configurations
• Unable to log in to server using GSSAPI or NTLM authenticated POP account
• Various visual and theming improvements
• Various security issues fixes

For more details, please check: https://www.thunderbird.net/en-US/thunderbird/102.2.0/releasenotes/