Thunderbird has released its latest monthly update, version 144, which focuses on a series of bug fixes rather than introducing major new features. The open source email client, developed by MZLA Technologies, is experiencing growth with a reported annual revenue increase of 19%, reaching over $10 million.
Among the notable improvements for Fastmail users is the restoration of CalDAV password functionality, which allows for effective viewing and editing of Fastmail calendars again. Additionally, the update resolves issues with task reminders for tasks lacking end dates or having shifted due dates, ensuring that reminders now function as intended. Users will also benefit from a fix that no longer causes Thunderbird to hang when checking for new messages across multiple accounts.
For those utilizing Microsoft Exchange accounts, the previously missing "Reply All" button in the composer has been reinstated. Furthermore, users can now send emails through servers with self-signed certificates without complications.
The update also addresses several other issues, including:
- Thread sorting was limited to unread top messages.
- The inability to read emails signed with OpenPGP v6 and PQC keys.
- Inaccurate listings during multi-attachment delete/detach confirmations.
- Problems with copying text from certain error alerts.
- Drafts not saving when switching identities in the compose window.
- Newly created folders not appearing in the "Recent" section after moving messages.
- Issues preventing the deleting of attachments in OpenPGP messages using the Delete key.
- A bug causing failures in the image preview function during the "Insert Image" dialog.
- Failures in copying messages from a newsgroup filter or importing profiles.
In addition to user-facing fixes, Thunderbird 144 comes with a range of security updates that address various memory safety bugs and mitigate risks linked to potential exploitation via cross-process information leaks.
Users can download Thunderbird 144 for Linux, Windows, and macOS from the official website. The default release structure has adjusted to a monthly cadence, with the latest being version 144 this October. Users on Windows or macOS can seamlessly auto-update, while Linux users can upgrade through their respective package managers depending on the build.
Download Thunderbird for Linux, Windows, and macOS.