Thunderbird 91.8.0


Thunderbird is a free, open-source, cross-platform application for managing email and news feeds. It is a local (rather than a web-based) email application that is powerful yet easy-to-use. Thunderbird is developed, tested, translated and supported by the folks at Mozilla Corporation and by a group of dedicated volunteers. Thunderbird gives you control and ownership over your email. There are lots of add-ons available for Thunderbird that enable you to extend and customize your email experience.

Thunderbird gives you IMAP/POP support, a built-in RSS reader, support for HTML mail, powerful quick search, saved search folders, advanced message filtering, message grouping, labels, return receipts, smart address book LDAP address completion, import tools, and the ability to manage multiple e-mail and newsgroup accounts.

Changes in Thunderbird 91.8.0:

  • Google accounts using password authentication will be migrated to OAuth2. See KB Article.


  • OpenPGP ECC keys created by Thunderbird could not be imported into GnuPG
  • Exporting multiple public PGP keys from Thunderbird was not possible
  • Replying to a newsgroup message erroneously displayed a "No-reply" popup warning
    Opening mid: URLs on macOS failed
  • Address books stored in older formats were loaded as SQLite files, causing a crash
  • Replicated LDAP directories were lost after switching Thunderbird to "Offline"`mode
  • Importing webcals from the commandline failed if the URI ended with an .ics file extension
  • Various security fixes

Download: Thunderbird 91.8.0 for Windows (EN/US) | 32-bit | ~50.0 MB (Open Source)
Download: Thunderbird 91.8.0 for Linux (EN/US) | 71.9 MB
Download: Thunderbird 91.8.0 for Mac OS (EN/US) | 119.0 MB
Download: Thunderbird 91.8.0 in other languages
View: Thunderbird Website | Release Notes | Screenshot

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