Download Mozilla Thunderbird 102.3.1

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The Mozilla Foundation has released version 102.3.1 of Thunderbird. Thunderbird is an open source email and newsgroup client, with features such as support for multiple email and news accounts, a spam filter, spell checker, and a customizable appearance. In version 102 Mozilla has refreshed the user interface and the address book, made importing and exporting user accounts easier and added the Matrix chat protocol. The following improvements have also been made in this update:


  • Compose window encryption options now only appear for encryption technologies that have already been configured
  • Number of contacts in currently selected address book now displayed at bottom of Address Book list column


  • Password prompt did not include server hostname for POP servers
  • Edit Contact was missing from Contacts sidebar context menus
  • Address Book contact lists cut off display of some characters, the result being unreadable
  • Menu items for dark-themed alarm dialog were invisible on Windows 7
  • Various security fixes

Version number 102.3.1
Release status Final
Operating systems Windows 7, Linux, macOS, Windows 8, Windows 10, Windows 11
Website Mozilla Foundation
License type Prerequisites (GNU/BSD/etc.)
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