Thunderbird Desktop
Version 51.0beta | Released January 18, 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.
What’s New
new
Calendar: Event can now be created and edited in a tab. (Preview feature: Set preference calendar.item.editInTab to enable)
new
Chat: Support Jabber/XMPP Message Carbons (XEP-280)
What’s Changed
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
What’s Fixed
fixed
Message preview pane non-functional after IMAP folder was renamed or moved
fixed
Various corrections when composing messages in paragraph format
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
"Move To" button on "Search Messages" panel not working
fixed
Message sent to "undisclosed recipients" shows no recipient (non-functional since Thunderbird version 38)
fixed
Calendar: Events are not always printed in the correct timezone (in month and week grid)
Known Issues
unresolved
Due to an Apple touch bar bug, Thunderbird on recent MacBook Pro may crash when open for long periods or crash after resuming from sleep. Apple reports to have a fix for this in the currently unreleased OS X 10.12.3
