Following the release of the Mozilla Firefox 160 web browser today, Mozilla also released the Mozilla Thunderbird 160 open-source email, chat, address book, news, and calendar client for all supported platforms.
Mozilla Thunderbird 160 adds support for the Ctrl+A keyboard shortcut for selecting all filters in the Message Filters dialog, improves OAuth sign-in windows to explain when blocked cookies may prevent sign-in, and updates Office 365 account setup to no longer automatically offer EWS configuration.
Thunderbird 160 fixes numerous bugs, starting with a crash that could occur when opening a window, a crash caused by message database updates, and a freeze of new mail notifications when processing some sender addresses.
IMAP retention settings no longer delete newer messages instead of older ones, folders no longer disappear after a restart on servers using compression, and namespace root folders are no longer missing or given incorrect permissions.
Undo is no longer disabled after deleting messages, dragging multiple selected folders now moves all of them, renaming or moving folders no longer removes them from saved searches, and Thunderbird now warns before repairing folders with offline message storage.
POP3 and news messages with LF line endings are no longer parsed incorrectly, Edit as New Message now works for some news messages, and empty message filter conditions no longer cause incorrect matches. The News Reader and Feed Reader also got various improvements.
On the interface side, Mozilla Thunderbird 160 improves the macOS Dock badge to no longer omit unread counts with multiple accounts, improves the Windows system tray icon to update when new mail arrives, brings back the option to create a mailing list, and updates toolbar defaults to no longer close the customization dialog.
Composing sees fixes too, with the spelling dictionary menu no longer empty in the Subject field, tabbing from the Subject field now moving focus to the message body instead of the header divider, and replies to saved messages no longer blocked despite a valid Reply-To address.
On top of all that, account setup got better as Exchange autodiscovery no longer fails when redirected to another email address, Graph account setup now works for tenants without a SharePoint license, and address book setup no longer returns to mail setup when no mail account exists.
Address books and CardDAV also see fixes, with filter conditions now matching messages that have missing addresses, website fields no longer prefixing non-HTTP links with HTTPS, and CardDAV contacts with multiline street addresses no longer appearing empty.
Also, CardDAV contacts are now saved in a format supported by more servers, and photos saved in vCard 3.0 contacts now appear correctly in other clients. Lastly, Delete Event is no longer enabled for read-only calendars in the Today Pane, and attendance options now appear for all recurring event series.
Furthermore, the task list no longer stops updating after toolbar customization, and CalDAV reminders can be dismissed and snoozed again. Some webcal calendar subscriptions are no longer incorrectly blocked, and invalid ICS calendar files are no longer overwritten when events are changed.
Check out the release notes for more details about the changes included in Mozilla Thunderbird 160, which is available for download right now from the official website as binaries for Linux, macOS, and Windows systems. Linux users can also install Thunderbird from their distro’s repositories or from Flathub.