Release Notes

Thunderbird Desktop

Version 52.6.0 | Released January 25, 2018

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.

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

What’s Fixed

fixed

Searching message bodies of messages in local folders, including filter and quick filter operations, not working reliably: Content not found in base64-encode message parts, non-ASCII text not found and false positives found.

fixed

Defective messages (without at least one expected header) not shown in IMAP folders but shown on mobile devices

fixed

Calendar: Unintended task deletion if numlock is enabled

fixed

Various security fixes

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