Beta Notes

If a message fails to send, a message is now logged in the console tab of the Developer Toolbox which identifies which message failed to send

Address book: Added support for OAuth2 CardDAV providers

Calendar: Thunderbird now informs the operating system that it knows how to open webcal: and webcals: URLs

MailExtensions: Added the capability to query a specific headerMessageId via extension API which is persistent across application restarts

MailExtensions: new functions: accounts.getDefault() and accounts.getDefaultIdentity(accountId)

The UI Customization controls formerly in the Customize submenu have all been moved into the View menu

Address book: CardDAV is now enabled by default (it was previously behind a hidden preference and off by default)

Calendar: Opening an event in the Today pane now opens the event summary

Calendar: When creating a new calendar, CalDAV is now used by default when supported by the server

MailExtensions: setComposeDetails and begin* functions of compose API now use body and plainTextBody as compose mode selectors

MailExtensions: Variable names for accessing notifications have changed

MailExtensions: Read-only address books now accessible

MailExtensions: messages.list(folder) on a non-existent folder now throws an ExtensionError exception

Various printing bugfixes

Various message search toolbar fixes

Address book: Read-only CardDAV address books were writable

Address book: Autocomplete suggestions did not appear next to the field when editing address book entries with an IME enabled

Address book: Default address book preference was not honored

Compose window: The user-configured style for quoted text was not honored

Compose window: Recipient addresses that had not yet been autocompleted were lost when clicking Send button

Compose window: New message is no longer marked as "changed" just from tabbing out of the recipient field without editing anything

Calendar: System timezone was not always properly detected

Calendar: The toolbar in the invitation details dialog was not honoring the theme colors

Account settings: When creating a new account, some already entered settings did not copy to the Advanced Config dialog

Account settings: When updating the title of a news & blogging type account, the title of the tab did not change

Chat: Could not add TLS certificate exceptions for XMPP connections

MailExtensions: browserActions moved to a different toolbar are now properly displayed after restarting Thunderbird

MailExtensions: browser.compose.beginNew was not properly honoring plaintext vs HTML settings

MailExtensions: browser.compose.setComposeDetails did not properly handling Windows-style line endings

MailExtensions: windows.create and windows.update did not honor the titlePrefix parameter

MailExtensions: messages.getFull() did not return all parts with OpenPGP enabled

Sending messages and saving drafts with attachments that were copy & pasted into the compose window could fail

Calendar: Descriptions were sometimes blank when editing a single occurrence of a repeating event

LDAP address book stability fix

Very long subject lines distorted the message compose and display windows, making them unusable

Messages with invalid vcard attachments were not marked as read when viewed in the preview window

OpenPGP: Embedded newlines in an inline OpenPGP message failed to verify

Visual consistency and theme improvements