Thunderbird Beta Notes

Version 60.0beta, first offered to channel users on March 26, 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.

These release notes apply to Thunderbird version 60 beta 10 released July 10th, 2018.

What’s New

  • new

    When writing a message, a delete button now allows the removal of a recipient. This delete button is displayed when hovering the To/Cc/Bcc selector.

  • new

    Further improvements to attachments handling during compose: "Attach" button moved to the right to be above the attachment pane. Alt+M now allows to show the attachment pane. The attachment pane can also be shown initially when composing a new message. Right-click on the header to enable this option. It is now also impossible to completely collapse a non-empty attachment pane. That protects against attachments accidentally being sent.

  • new

    Thunderbird now allows the conversion of folders from mbox to maildir format and vice versa. This is an experimental feature that needs to be enabled by setting the preference mail.store_conversion_enabled. Note that this functionality does not not work if the option "Allow Windows Search/Spotlight to search messages" is selected.

  • new

    Light and Dark themes

  • new

    WebExtension themes are now enabled in Thunderbird

  • new

    FIDO U2F support

  • new

    Calendar: Allow copying, cutting or deleting of a selected occurrence or the entire series for recurring events

  • new

    Calendar: Provide an option to display locations for events in calendar day and week views

  • new

    Calendar: Provide the ability for sending/not sending meeting notifications directly instead of showing a popup

  • changed

    IMPORTANT: Add-ons not marked as compatible with Thunderbird 60 by their authors will be disabled (this can be reverted via preference extensions.strictCompatibility)

  • changed

    Thunderbird will now prompt to compact IMAP folders even if the account is online. Note: Under certain circumstances an incorrect estimate of the expected gain is shown.

  • changed

    Better address book photo handling: Photos can be added by drag and drop and a copy of all photos will be stored in the Thunderbird profile

  • changed

    Native notifications on Linux are now re-enabled

  • changed

    During address entry, the matching part of the address is now shown in bold. Preference mail.autoComplete.commentColumn allows to display the address book where the address is stored.

  • changed

    Calendar: Removal of capability to send email invitations compatible to Outlook 2002 and earlier

  • fixed

    Various problems when forwarding messages inline: Some introduced in Thunderbird 60 beta 7, some dating back to 2005 when using "simple" HTML view.

  • fixed

    The IMAP and News subscribe dialog did not present a folder tree (not working since Thunderbird version 59)

  • fixed

    Messages moved between IMAP accounts were missing parts (embedded content or attachments) under some circumstances

  • fixed

    Better error handling for Gmail authentication to avoid re-downloading of folders

  • fixed

    Text in the address book card view wasn't selectable

  • fixed

    UTF-7 support (not working since Thunderbird version 56)

  • fixed

    Complete fix of the EFAIL vulnerability: 1) Removing some HTML crafted to carry out an attack. 2) Not decrypting subordinate message parts that otherwise might reveal decrypted content to the attacker. Preference mailnews.p7m_subparts_external controls this.

  • fixed

    Thunderbird used a stale cached password after user edited a saved password

  • fixed

    The new menu item "Add-on Options" introduced in Thunderbird 59 beta is now also working on Mac

  • fixed

    Source view not working for JS, XML, CSS, etc. source files via 'Developer Tools > Error Console'. Other options: 1) Set preference view_source.editor.external and view_source.editor.path to view the source in the editor of your choice. 2) Use 'Developer Tools > Developer Toolbox, Console'. (not working in earlier versions of Thunderbird 60 beta)

  • fixed

    Deleting or detaching attachments corrupted messages under certain circumstances (not working in earlier versions of Thunderbird 60 beta)

  • fixed

    Calendar: Google account credentials not retained by Lightning

Known Issues

  • unresolved

    Provider for Google Calendar not available

  • unresolved

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