https://www.thunderbird.net/thunderbird/releases/atom.xml Thunderbird Release Notes Thunderbird Release Notes feed provides a simple way to keep up to date with Thunderbird releases. 2026-05-12T20:24:06+00:00 https://www.thunderbird.net/media/img/thunderbird/thunderbird-256.png https://www.thunderbird.net/media/img/thunderbird/favicon-196.png thunderbird-website https://www.thunderbird.net/en-US/thunderbird/140.10.2esr/releasenotes/ Thunderbird 140.10.2esr Thunderbird https://www.thunderbird.net 2026-05-08T00:00:00+00:00 2026-05-08T00:00:00+00:00 Fixed

As always, you’re encouraged to tell us what you think, ask for help, or file a bug in Bugzilla

]]> https://www.thunderbird.net/en-US/thunderbird/150.0.2/releasenotes/ Thunderbird 150.0.2 Thunderbird https://www.thunderbird.net 2026-05-08T00:00:00+00:00 2026-05-08T00:00:00+00:00 Fixed

As always, you’re encouraged to tell us what you think, ask for help, or file a bug in Bugzilla

]]> https://www.thunderbird.net/en-US/thunderbird/140.10.1esr/releasenotes/ Thunderbird 140.10.1esr Thunderbird https://www.thunderbird.net 2026-04-30T00:00:00+00:00 2026-04-30T00:00:00+00:00 Fixed

As always, you’re encouraged to tell us what you think, ask for help, or file a bug in Bugzilla

]]> https://www.thunderbird.net/en-US/thunderbird/150.0.1/releasenotes/ Thunderbird 150.0.1 Thunderbird https://www.thunderbird.net 2026-04-30T00:00:00+00:00 2026-04-30T00:00:00+00:00 Fixed

  • Thunderbird could crash when processing message headers

  • Security fixes

As always, you’re encouraged to tell us what you think, ask for help, or file a bug in Bugzilla

]]> https://www.thunderbird.net/en-US/thunderbird/140.10.0esr/releasenotes/ Thunderbird 140.10.0esr Thunderbird https://www.thunderbird.net 2026-04-21T00:00:00+00:00 2026-04-21T00:00:00+00:00 Fixed

  • Newly translated strings were not available in Thunderbird

  • Security fixes

As always, you’re encouraged to tell us what you think, ask for help, or file a bug in Bugzilla

]]> https://www.thunderbird.net/en-US/thunderbird/150.0/releasenotes/ Thunderbird 150.0 Thunderbird https://www.thunderbird.net 2026-04-21T00:00:00+00:00 2026-04-21T00:00:00+00:00 What’s New

  • 'Recent Destinations' in General Settings now supports alphabetical sorting

  • Added support for generating Unobtrusive Signatures (OpenPGP)

  • Message body search enabled for OpenPGP and S/MIME encrypted messages

  • Account hub is opened on the first run of Thunderbird

  • Address book cards can be copied to the clipboard as vCard

  • Custom Accent Color can be chosen in Appearance Settings

  • Calendar month/multiweek views are now scrollable with touch screen

  • PDF pages can be reorganized directly in the PDF viewer

Changed

  • Flatpak beta app ID changed from org.mozilla.Thunderbird to org.mozilla.thunderbird

Fixed

  • Unknown command-line arguments passed to Thunderbird did not print warning

  • Thunderbird could crash when creating a folder

  • Saved email filenames were not not always cross-platform safe

  • Compose progress dialog used unlocalised folder name

  • Clicking on a folder in the folder pane did not always open folder

  • Could not scroll to message bottom or view all attachments in some cases

  • Accounts could be listed twice after adding new account

  • Account Hub manual configuration was missing OAuth2 option

  • Microsoft Store installs did not open when clicking 'news://' link or .eml file

  • Folder states were not exposed to screen readers in saved search properties

  • Mailbox name was not announced and message count was incorrect for screen readers

  • POP3 could stop downloading mail until restart

  • Exchange servers/clients caused memory leaks by holding mutual references

  • Authentication could fail for some exchange accounts

  • 'Move to New Window' option for the calendar was disabled

  • Calendar view had date and time axes swapped

  • Visual and UX improvements

  • Security fixes

As always, you’re encouraged to tell us what you think, ask for help, or file a bug in Bugzilla

]]> https://www.thunderbird.net/en-US/thunderbird/140.9.1esr/releasenotes/ Thunderbird 140.9.1esr Thunderbird https://www.thunderbird.net 2026-04-07T00:00:00+00:00 2026-04-07T00:00:00+00:00 Fixed

As always, you’re encouraged to tell us what you think, ask for help, or file a bug in Bugzilla

]]> https://www.thunderbird.net/en-US/thunderbird/149.0.2/releasenotes/ Thunderbird 149.0.2 Thunderbird https://www.thunderbird.net 2026-04-07T00:00:00+00:00 2026-04-07T00:00:00+00:00 Fixed

As always, you’re encouraged to tell us what you think, ask for help, or file a bug in Bugzilla

]]> https://www.thunderbird.net/en-US/thunderbird/149.0.1/releasenotes/ Thunderbird 149.0.1 Thunderbird https://www.thunderbird.net 2026-03-26T00:00:00+00:00 2026-03-26T00:00:00+00:00 Changed

  • There are no Thunderbird changes requiring release notes in this release

As always, you’re encouraged to tell us what you think, ask for help, or file a bug in Bugzilla

]]> https://www.thunderbird.net/en-US/thunderbird/140.9.0esr/releasenotes/ Thunderbird 140.9.0esr Thunderbird https://www.thunderbird.net 2026-03-24T00:00:00+00:00 2026-03-24T00:00:00+00:00 Fixed

As always, you’re encouraged to tell us what you think, ask for help, or file a bug in Bugzilla

]]>