Release Notes

Thunderbird Desktop

Version 102.7.0 | Released January 19, 2023

Check out the notes below for this version of Thunderbird. As always, you’re encouraged to tell us what you think, or file a bug in Bugzilla.

Thunderbird 102.7.0 will not automatically update due to a critical authentication issue with Microsoft 365 Business accounts. Affected users should not update until Thunderbird 102.7.1 is released with a fix. See Known Issues below. Opening the "About Mozilla Thunderbird" dialog will allow an update to 102.7.0.

For more on all the new features in Thunderbird 102, see What’s New in Thunderbird 102.

System Requirements: Details

  • Windows: Windows 7 or later
  • Mac: macOS 10.12 or later
  • Linux: GTK+ 3.14 or higher

What’s New

new

Enterprise policies now support Thunderbird-specific preferences

What’s Fixed

fixed

Localized builds and langpacks now use "comm-l10n" repository; downstream builds using official langpacks should not need to make changes

fixed

Having too many folders open at startup caused loss of MSF files

fixed

Copying an email from one local folder to another local folder sometimes caused "Another Operation is using the folder" error on Windows 7

fixed

Email address pill allowed for incorrectly formatted email addresses

fixed

Creating security exceptions for messages sent using a self-signed certificate failed if hostname contained uppercase letters

fixed

S/MIME certificate verification was prohibitively slow

fixed

OpenPGP key import failed for key blocks with comments that contain Unicode characters

fixed

Chat conversation sidebar was too wide under certain circumstances, making scrollbar unusable

fixed

On Mac, deleting events from Today Pane with "Backspace" key deleted selected messages instead

fixed

Various security fixes

Known Issues

unresolved

OAuth2 authentication not working for Microsoft 365 Enterprise accounts. See the Blog post for additional information. Bug 1810760

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