We're back with another Community Office Hours, and this month is all about our recent Extended Support Release, 140.0 ESR, code named "Eclipse!" But first, we're introducing a key new member of the Thunderbird team, Manager of Community Programs Michael Ellis! Afterwards, Toby Pilling, Sr. Manager of Desktop Engineering, introduces this ESR's focus on stability, and provide a refresher on the difference between the year ESR and the new default monthly Release channel. We discuss what's in, from Dark Message Mode to Experimental Exchange Support, as well as what didn't make the cut. (Yes, there's an update on Sync!) Finally, we end with how to get new features and fixes every month in the monthly Release.
So put on your ISO-approved shades and learn more about the newest Thunderbird!
00:00 Introduction and welcoming our new Community Programs manager
01:40 What is ESR and why it matters
02:49 Monthly Release vs. ESR
04:50 Stability Focus for ESR 140
05:55 Calendar and database backend plans
07:03 ESR testing and QA
08:20 Getting involved in design feedback
09:03 How the monthly Release improves ESR
12:00 What's In: Dark Message Mode
14:42 What's In: Appearance Settings
19:33 What's In: Manual Folder Sorting
21:15 What's In: Account Hub
27:59 What's In: Native Notifications
33:49 What's In: Experimental Exchange Support
39:06 What's In: Export to Thunderbird Android
40:10 What's In: Table View - Horizontal Scroll Support
41:14 Where to download 140.0 ESR
42:49 What's Out: Full Exchange Support
43:31 What's Out: New Calendar UI and Expanded Account Hub
45:14 What's Out: Sync Update
47:13 Why you should use monthly Release (and where to get it)
49:05 Final thoughts and thank you
Thunderbird UX Mailing List: https://thunderbird.topicbox.com/groups/ux
Interested in the Thunderbird Accessibility Committee? Email [email protected]
Suggest new features: https://connect.mozilla.org
Account Hub Office Hours blog: https://blog.thunderbird.net/2025/04/video-the-new-account-hub/
Manual Folder Sort Bug (and Community Development): https://bugzilla.mozilla.org/show_bug.cgi?id=1846550
Exchange Support Wiki: https://wiki.mozilla.org/Thunderbird:Exchange
Get Involved With Exchange: email [email protected]
Thunderbird + Rust Office Hours Playlist: https://www.youtube.com/playlist?list=PLMY3ZzVsXXyqN6yL9Snm6W19WhBPntj1Z
QR Code Import Knowledge Base Article: https://support.mozilla.org/kb/thunderbird-android-import
Release Channel Blog: https://blog.thunderbird.net/2025/03/thunderbird-release-channel-update/