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!
Chapters:
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
Resources: Thunderbird UX Mailing List: https://thunderbird.topicbox.com/groups/ux Interested in the Thunderbird Accessibility Committee? Email laurel@thunderbird.net 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 heather@thunderbird.net 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/