Release Notes

Thunderbird Desktop

Version 52.0 | Released April 10, 2017

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.

System Requirements: • Window: Windows XP, Windows Server 2003 or later • Mac: Mac OS X 10.9 or later • Linux: GTK+ 3.4 or higher Details here.

What’s New

new

Folder pane toolbar and folder view selector (replacement for folder view arrows).

new

Optionally remove corresponding data files when removing an account from Thunderbird.

new

Import settings from Becky! Internet Mail.

new

Possibility to copy message filter.

new

Dictionary setting is restored when editing a draft. Content-Language header (RFC 3282) transmitted with message.

new

Calendar: Event can now be created and edited in a tab.

new

Calendar: Processing of received invitation counter proposals.

new

Chat: Support Twitter Direct Messages.

new

Chat: Liking and favoriting in Twitter.

new

Chat: XMPP: Support SASL SCRAM authentication mechanism

new

Chat: Support Jabber/XMPP Message Carbons (XEP-280).

What’s Changed

changed

IMPORTANT: The way images are included in a compose window has changed. Images are now included as data URIs and not as references to parts of other messages or operating system files. This allows better interoperability with office packages such as MS Office or LibreOffice. Images linked from locations on the internet will no longer be downloaded and attached to the message automatically. This can be changed for each image individually via the Image Properties dialog or globally by setting the preference mail.compose.attach_http_images.

changed

Correspondents column now default for all new folders, can be switched off with preference mail.threadpane.use_correspondents.

changed

On Linux PulseAudio is now required to play sound.

changed

Formatting toolbar is now left in place when delivery format is switched to plain text only.

changed

Messages in IMAP folders read on external device are now filtered by default.

changed

Folders backed by mbox storage larger than 4GB are supported without warning (unless preference mailnews.allowMboxOver4GB is set to false).

changed

IMAP caching now uses Mozilla's latest caching technology.

changed

The keyboard shortcut to insert hyperlinks into a compose window was changed from CTRL+L to CTRL+K to align with Office applications.

changed

Chat: Removed Yahoo! Messenger support (since Yahoo removed support).

What’s Fixed

fixed

Message preview pane non-functional after IMAP folder was renamed or moved.

fixed

Editing in paragraph format: Pressing Shift+Enter sometimes doesn't move the cursor to the next line.

fixed

Various corrections when composing messages in paragraph format.

fixed

Paste as quotation doesn't always work.

fixed

Long lines in plain text replies not properly wrapped.

fixed

Undesired white-space before signature in paragraph mode.

fixed

When attachment unavailable, compose shows endless "Attaching..." message instead of error.

fixed

Text encoding of reply sometimes incorrect (uses encoding of last viewed message).

fixed

Text encoding of message display, reply or forwarded message sometimes incorrect (uses encoding of attachment).

fixed

Delivery Format not preserved for saved drafts (Auto-Detect|Plaintext|HTML|Both).

fixed

Reply to own e-mail does not reply with the correct identity.

fixed

IMAP message part caching.

fixed

Links with escaped non-ASCII (international) characters can't be clicked.

fixed

Calendar: Events specified in timezone 'local time' generate alerts in UTC time.

fixed

Chat: XMPP Resource collisions.

fixed

Various security fixes.

Known Issues

unresolved

Large number of blank pages being printed under certain circumstances. To fix this problem, remove all printer specific preferences in the configuration editor.

unresolved

Large attachments may not be shown or saved correctly if the message is stored in an IMAP folder which is not synchronized for offline use. Workaround: Set preference browser.cache.memory.max_entry_size to the value of -1 (unlimited) and create integer preference browser.cache.memory.capacity with the value of 200000 (200 MB, 25 MB per message).

unresolved

Crash due to incompatibility with McAfee Anti-SPAM add-on. Workaround: Start in safe mode and disable McAfee Anti-Spam Extension.

unresolved

Background images not working and other issues related to embedded images when composing email.

unresolved

Crash when compacting IMAP folder.

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