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

Thunderbird for Mac

Thunderbird 91.3.0

  -  118 MB  -  Open Source

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 91.3.0.


For those interested in downloading the most recent release of Thunderbird for Mac 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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  • Thunderbird 91.3.0 Screenshots

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    Thunderbird 91.3.0 Screenshot 1
  • Thunderbird 91.3.0 Screenshot 2
  • Thunderbird 91.3.0 Screenshot 3
  • Thunderbird 91.3.0 Screenshot 4
  • Thunderbird 91.3.0 Screenshot 5

What's new in this version:

Fixed:
- Default mail headers were set incorrectly when the value contained a colon (:)
- Thunderbird did not send the QUIT command when closing an SMTP connection
- Mail tabs could not be closed using the context menu
- "Print" context menu was still shown when no message pane was displayed
- Windows tray icon did not reappear after restarting Windows Explorer
- Compose window attachment drag and drop fixes
- Various macOS stability improvements
- Drag and Drop area for file attachments on Windows was incorrect
- CardDAV address books without a name did not work
- Thunderbird tried to refresh disabled and manual-only calendars when the network state changed from offline to online
- Various Calendar event dialog fixes
- Various security fixes