Thunderbird 78.2.0


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 78.2.0:

  • OpenPGP Key generation now disabled when there is no default mail account configured
  • OpenPGP: Encrypt saved drafts when OpenPGP is enabled
  • Twitter search removed
  • Calendar: Event summary dialog is now themeable
  • MailExtensions: Some APIs now use defineLazyPreferenceGetter in order to benefit from caching


  • OpenPGP Key Manager search function did not work
  • OpenPGP Key Properties dialog was sometimes too small
  • OpenPGP: Encrypted email would not send if address contained uppercase characters
  • OpenPGP: "Key ID" column could not be resized in Key Manage
  • OpenPGP: Keys containing invalid UTF-8 strings could not be imported
  • OpenPGP: Enable automatic signing for encrypted messages in additional scenarios
  • Many more OpenPGP bug fixes and improvements
  • IMAP fetch chunk size was always 65536 bytes
  • Attachment corruption could occur when downloading large attachments from an IMAP server that supports chunking
  • IMAP server capabilities were not rechecked after upgrading to SSL/TLS connection
  • Message Composer: Order of attachments could not be modified using drag & drop
  • Composing messages with a "fixed width" font did not work
  • Drag and drop of address book contacts did not work in some situations
  • Address book migration failed when there was a dot in the file name
  • Address book: "Always prefer display name over message header" was always checked when editing a contact
  • Address book performance optimizations
  • Dialog to add a new mail account from "Account Settings" did not open
  • "Select All" (Ctrl+A) in message source did not work until focused with a mouse click
  • Ctrl+scroll wheel not zooming in message reader
  • Setting/changing a signature from a file lost when closing account settings
  • Adaptive Junk Mail settings could not be disabled
  • Message filter dialog fixes: Missing scrollbar, drop-down list not wide enough
  • Various UX and theme improvements

Download: Thunderbird 78.2.0 for Windows (EN/US) | 64-bit | ~35.0 MB (Open Source)
Download: Thunderbird 78.2.0 for Linux (EN/US) | 55.5 MB
Download: Thunderbird 78.2.0 for Mac OS (EN/US) | 66.4 MB
Download: Thunderbird 78.2.0 in other languages
View: Thunderbird Website | Release Notes | Screenshot

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