The reports of Thunderbird's death have been greatly exaggerated.

Docs for Developers

You've fixed a bug, now what?

Once a bug lands on comm-central, it is marked FIXED and the Target Milestone is set to next trunk release milestone (the current Nightly version).

Channels/Repositories

  • Thunderbird Daily - comm-central - Automatic daily releases that contain experimental features
  • Thunderbird Beta - comm-beta - The next version of Thunderbird developed over the course of a year
  • Thunderbird Release - comm-esrXX - The official release of Thunderbird