Thunderbird to flap twice as fast from September
- ID
- 16155
- Status
- summarized
- Published
- 20 Aug 2026, 11:03 PM
- Fetched
- 21 Aug 2026, 1:51 AM
- Provider
- The Register
- Category
- technology
- Original URL
- https://www.theregister.com/software/2026/08/20/thunderbird-to-flap-twice-as-fast-from-september/5290393
- Source URL
- https://www.theregister.com/headlines.atom
Summary
- Score
- 4.5
- Created
- 21 Aug 2026, 1:54 AM
- Tags
- Audience
- developers
What happened
Thunderbird will move to a fortnightly release cadence starting September, matching Firefox's accelerated two-week schedule. Thunderbird 154 adds Microsoft Graph API support for Microsoft 365, which is timely because Exchange Web Services is being deprecated for Microsoft's cloud products. Firefox 154 adds GeForce NOW support, Mac profile backups, and an AI-powered 'Smart Window' feature.
Why it matters
If you manage Thunderbird deployments connected to Microsoft 365, you should plan migration from EWS to the new Graph API support in version 154 before EWS stops working. IT teams who prefer stability should pin to version 153 ESR, which remains supported for the next year while the new two-week release cycle begins.
Discussion angle
Whether the two-week release cadence for a desktop email client is sustainable for enterprise IT teams, and whether pinning to ESR is now the only sane strategy for organizations that can't test updates that frequently.