Download Mozilla Thunderbird 91.6.2

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The Mozilla Foundation has released version 91.6.2 of Thunderbird. Thunderbird is an open source email and newsgroup client with features such as support for several mail and news accounts, a spam filter, spell checker, and a customizable appearance. In version 91 includes a warning when an email is sent to a potentially non-existent address, or if there are too many addresses on the public address line. There is also support for CardDAV and there is a native client for a Mac equipped with an Apple Silicon processor. The following changes and improvements have also been made in this release:


  • Temporary files from opened attachments were saved with world-readable permission
  • Various security fixes

Version number 91.6.2
Release status Final
Operating systems Windows 7, Linux, macOS, Windows 8, Windows 10, Windows 11
Website Mozilla Foundation
License type Conditions (GNU/BSD/etc.)
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