Release Notes

Thunderbird Desktop

Version 115.3.0 | Released September 26, 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.

For help and a quick start on Thunderbird 115, see Thunderbird 115 Supernova FAQ

For more on all the new features in Thunderbird 115, see What’s New in Thunderbird 115.

System Requirements: Details

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

What’s Fixed

fixed

Thunderbird could not import profiles with hostname ending in dot (".")

fixed

Message header was occasionally missing in message preview

fixed

Setting an existing folder's type flag did not add descendant folders to the Unified Folders view

fixed

Thunderbird did not always delete all temporary mail files, sometimes preventing messages from being sent

fixed

Status bar in Message Compose window could not be hidden

fixed

Message header was intermittently missing from message preview

fixed

OAuth2 did not work on some profiles created in Thunderbird 102.6.1 or earlier

fixed

In Vertical View, decrypted subject lines were displayed as ellipsis ("...") in message list

fixed

Condensed address preference (mail.showCondensedAddresses) did not show condensed addresses in message list

fixed

Spam folder could not be assigned non-ASCII names with IMAP UTF-8 enabled

fixed

Message header was not displayed until images finished loading, causing noticeable delay for messages containing large images

fixed

Large SVG favicons did not display on RSS feeds

fixed

Context menu items did not display a hover background color

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