Beta Notes

Thunderbird Desktop

Version 123.0beta | Released January 25, 2024

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.

These notes apply to Thunderbird version 123 beta 5 released February 12, 2024.

System Requirements: Details

  • Windows: Windows 10 or later
  • Mac: macOS 10.15 or later
  • Linux: GTK+ 3.14 or higher

What’s New

new

Added support for OS-specific accent colors

1869893

new

Manual account configuration now implements form validation

1863264

new

Added option to show packet dump when OpenPGP fails to decrypt

1874504

new

UI density now affects multi-message view

1868863

What’s Changed

changed

Added Show more/less buttons to notifications in Account Hub

1863265

changed

Folder alerts now display full path of affected folder

988792

changed

IMAP "Too Many Connections" alerts now display IMAP server name

561055

changed

Disabled support for LibrePGP v5 AEAD/OCB decryption

1872833

What’s Fixed

fixed

OpenPGP Key Manager filtering did not work

1873655

fixed

OpenPGP sometimes attempted to decrypt message with incorrect key

1865620

fixed

Autoconfig failed on servers that did not support OAuth2

1869122

fixed

Network settings window was blank

1871983

fixed

Selected row in folder pane did not always remain visible when using keyboard navigation

1868094

fixed

Hovering over folder does not always expand subfolders

1873101

fixed

Yahoo! and AOL account message filters only filtered most recent message match

1865598

fixed

Quick Filter settings did not persist when Quick Filter bar was turned off

1850266

fixed

Mail tab-specific Unified Toolbar buttons received focus incorrectly

1872239

fixed

Clicking "Sent unsent messages" in Outbox context menu while in offline mode did not prompt user to go online

1873487

fixed

"Confirm Deletion" prompt was incorrectly shown when deleting messages with Grouped By header also selected

1873313

fixed

Thread collapsing did not behave correctly when copying thread messages in multi-folder view

1872253

fixed

Opened ignored messages in a message thread/subthread were not marked as read in IMAP folders

448876

fixed

Opening different attachments with the same name in different messages could cause attachment files to become conflated

1873023

fixed

Address Book scrolling did not work when using keyboard navigation

1870873

fixed

When creating new calendar, password prompt showed "rememberPassword" instead of "Use Password Manager to remember this password."

1872559

fixed

Overflowed attachment list could not be scrolled

1871343

fixed

Thread styling appeared on Grouped by Sort messages

1865362

fixed

Various visual and UX improvements

1855611 1869294 1870323 1870331 1870705 1871001 1872873 1873236

Fixed in beta 2

What’s Fixed

fixed

Remote content warning was shown multiple times for the same message

1875536

Fixed in beta 3

What’s Fixed

fixed

Thunderbird slowed down significantly when opening email files (.eml)

1863957

fixed

Passwords disappeared from password manager list after applying and clearing filters

1874646

fixed

Cookies in cookie manager list disappeared after applying and then clearing filters

1876733

Fixed in beta 4

What’s Fixed

fixed

A selected attachment's filename in the mail reader was not visible

1878414

Fixed in beta 5

What’s Fixed

fixed

S/MIME encryption failed to encrypt if unsupported certificate type was encountered

1876931

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