Release Notes

Thunderbird Desktop

Version 52.1.1 | Released May 15, 2017

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.

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.

Please refer to Release Notes for version 52.0 to see the list of improvements and fixed issues.

What’s Fixed


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.


Unable to load full message via POP if message was downloaded partially (or only headers) before.


Some attachments can't be opened or saved if the message body is empty.


Crash when compacting IMAP folder.

Known Issues


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


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


Messages sent via the Simple MAPI interface are forced to HTML. Will be fixed in next release.

Learn What’s Next

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