Thunderbird Release Notes

Version 60.4.0, first offered to channel users on December 20, 2018

Check out "What’s New" and "Known Issues" for this version of Thunderbird below. As always, you’re encouraged to tell us what you think, or file a bug in Bugzilla. If interested, please see the complete list of changes in this release.

If you have installed Lightning, Thunderbird's Calendar add-on, it will automatically be updated to match the new version of Thunderbird. Refer to this Calendar troubleshooting article in case of problems.

System Requirements: • Window: Windows 7, Windows Server 2008 R2 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 60.0 to see the list of improvements and fixed issues.

What’s New

  • new

    WebExtensions FileLink API to facilitate FileLink add-ons. For the future version Thunderbird 60.5.0: WeTransfer will be included in Thunderbird 60.5.0 and the Dropbox add-on will be compatible with Thunderbird 60.5.0.

  • fixed

    Decoding problems for messages with less common charsets (cp932, cp936)

  • fixed

    New messages in the drafts folder (and other special or virtual folders) will no longer be included in the new messages notification

  • fixed

    Various security fixes

Known Issues

  • unresolved

    Crash when using custom sound for new email notification. Workaround: Use system sound.

  • unresolved

    Due to changes in the Mozilla platform profiles stored on Windows network shares addressed via drive letters are now addressed via UNC

  • unresolved

    CalDav access to some servers not working. Workaround: Set preference network.cookie.same-site.enabled to false.

  • unresolved

    Chat: Twitter not working due to API changes at