De Mozilla Foundation heeft versie 147.0 van Thunderbird uitgebracht. Thunderbird is een opensourceclient voor e-mail en nieuwsgroepen met ondersteuning voor verschillende mail- en newsaccounts. Verder zijn er een spamfilter, spellingscontrole, kalender en adresboek, en heeft het een aanpasbaar uiterlijk. Thunderbird is beschikbaar in twee verschillende versies, die beide als stabiel worden aangeduid. De eerste wordt vaker voorzien van nieuwe functionaliteit en wordt als Release-versie aangeboden; de andere, de Extra Support Release-versie, wordt alleen van bugfixes en stabiliteitsverbeteringen voorzien. In deze uitgave zijn de volgende veranderingen en verbeteringen aangebracht:
What’s NewWhat’s Changed
- Add "Show Full Path" folder pane option for compact view modes
- Add `mail.useLocalizedFolderNames' to toggle special folder name localization
What’s Fixed
- Special folders are now localized based on a restricted set of names
- Selected status and priority was not displayed in search widgets
- Compacting multiple folders failed and did not compact
- Resetting manual folder sorting did not work for sub folders
- Unified archive subfolders could show wrong names and no messages
- Folders with deep hierarchy and long folder names could fail to display
- Moving saved search/virtual folder under IMAP could fail
- "Open and Show" for OpenPGP-signed message (.eml) did not work
- "Search Messages" search did not finish due to unparsable local folders
- Compose command line flag no longer worked correctly
- Search for "Attachment" in Settings menu did not find "Files and Attachments"
- Account Hub did not show error message on failure when creating OAuth2 EWS account
- Thunderbird could crash during exchange address account setup
- Japanese locale users could not create message filters
- Moving virtual folder within maildir based IMAP or local folder could fail
- Thunderbird could crash when marking all messages as read
- Startup could be slow with large number of folders not using subscriptions
- EWS message send that required a password errored instead of prompting
- EWS HTTP 500 backoff errors were not handled gracefully
- SMTP sending could hang when when multiple messages queued for sending
- Thunderbird could crash when emptying EWS trash
- Broken feed icon could prevent updating of feeds
- Calendar did not alert user for connection issues
- Creation of tasks with Start or Due date was not possible
- Visual and UX improvements
- Security fixes
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