Originally published at: Thunderbird 137 - TidBITS
MZLA Technologies Corporation (a subsidiary of the Mozilla Foundation) has released version 137 of its free Thunderbird email and productivity app with over 30 bug fixes. The update ensures in-app notifications display correctly in high contrast mode, fixes a bug that caused the IMAP folder to perform Delete instead of Undelete when mixed messages were selected, speeds up performance when moving bulk messages from IMAP to local, fixes a bug that caused line spacing to change unexpectedly in the message list with the default font size, and addresses a couple of crashes (when importing mail or searching during shutdown). (Free, 134.7 MB, release notes, macOS 10.15+)