A free email application from Mozilla that's easy to set up and customize

Thunderbird (64-bit)

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Thunderbird 134.0 (64-bit)

  -  65.8 MB  -  Open Source
Free Download

Security Status

Sometimes latest versions of the software can cause issues when installed on older devices or devices running an older version of the operating system.

Software makers usually fix these issues but it can take them some time. What you can do in the meantime is to download and install an older version of Thunderbird 134.0 (64-bit).


For those interested in downloading the most recent release of Thunderbird (64-bit) or reading our review, simply click here.


All old versions distributed on our website are completely virus-free and available for download at no cost.


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Download Thunderbird 134.0 (64-bit)

  • Thunderbird 134.0 (64-bit) Screenshots

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    Thunderbird 134.0 (64-bit) Screenshot 1
  • Thunderbird 134.0 (64-bit) Screenshot 2

What's new in this version:

New:
- Thunderbird now has a notification system for real-time desktop alerts
- In-app notification messages did not display correctly in dark mode
- In-app notification close button alignment not consistent across platforms
- Thunderbird could crash on startup when using POP3
- New mail notification could show for the wrong folder, causing repeated alerts
- MacOS shortcut CMD+1 did not restore the main window when it was minimized
- Clicking the context menu "Reply" button resulted in "Reply-All"
- Subscribe window "Show items that contain" should not have been shown for IMAP
- Downloading message headers from a newsgroup could cause a hang
- POP3 inbox could show new mail with no subject, no sender, and date 1970-01-01
- Message list performance slow when many updates happened at once
- Large virtual folders could be very slow
- "mailto:" links did not apply the compose format of the current identity
- Dragging embedded images from a message to a compose window was not possible
- Authentication failure of AUTH PLAIN or AUTH LOGIN did not fall back to USERPASS
- APOP authenication for POP3 did not prompt for corrected password
- XMPP chat did not display messages sent inside a CDATA element
- Release channel incorrectly opened whatsnew page
- Today pane agenda sometimes scrolled for no apparent reason
- Selecting a display option in View -> Tasks did not apply in the Task interface
- CalDAV calendars without offline support could degrade start-up performance
- Visual and UX improvements
- Security fixes

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