Thunderbird 91.2.0

[German]The developers of the Thunderbird email client have released Thunderbird 91.2.0 on October 7, 2021. This is a maintenance and security update for the 91 development branch, which makes minor fixes. Here is a brief overview.


Older versions of Thunderbird are not updated to the 91 development branch yet. According to the release notes (not yet posted on this page), Thunderbird now uses a unique file name when saving a single message as .eml. The update includes the following fixes. 

  • Subfolders were not correctly taken into account when notifying about new e-mails
  • Decryption of binary attachments when using an external GnuPG configuration failed
  • Account name fields in account management were not large enough for long names
  • LDAP searches with an extensibleMatch filter did not return any results
  • Read-only CalDAV calendars and CardDAV address books were not recognized
  • Multi-part messages that contained a calendar invitation did not display any of the human-readable alternatives
  • Some calendar days were displayed incorrectly or twice (e.g., two "29th" days of a given month)
  • A phantom event was displayed at the end of each day in the calendar week view

No security fixes were made according to this page

System requirements

The system requirements for the different operating system versions (see here for more details):  (siehe hier für weitere Details):

  • Windows: Windows 7, Windows Server 2008 R2 or higher
  • Mac: Mac OS X 10.12 or higher (macOS 11.0 for Silicon)
  • Linux: GTK+ 3.14 or higher

The download of the free Thunderbird is available here. (via)

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