Release Notes

Thunderbird Desktop

Version 115.4.2 | Released November 6, 2023

Check out the notes below for this version of Thunderbird. As always, you’re encouraged to tell us what you think, ask for help, 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

No messages or calendar items were displayed on startup

fixed

Toolbar & Folder View widget fixes

fixed

Insert image dialog was not properly sized on some localized builds

fixed

The "unencrypted subject" icon was always briefly displayed when replying to a message

fixed

RSS feeds with lengthy attachment filenames cut off visible content

fixed

RSS feeds with no favicon displayed default icon in the folder color

fixed

NNTP messages that were previously downloaded were not displayed if the server went offline

fixed

Vcard photos were not imported when using opening the file with Thunderbird

fixed

Publishing calendars to invalid URLs did not display a helpful error

fixed

Publishing calendar events via authenticated WebDAV failed

fixed

Converting a message to an event failed when the message pane was not displayed

fixed

Redirect dialog displayed for WebDAV calendars was too small

fixed

Visual and Theme improvements

Learn What’s Next

Thunderbird keeps getting better. Subscribe to our newsletter and follow us on social media to stay informed.