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  • About Thunderbird
  • Contributing to Thunderbird
    • Getting Started Contributing
    • Setting Up A Build Environment
    • Building Thunderbird
      • Windows Build Prerequisites
      • Linux Build Prerequisites
      • macOS Build Prerequisites
      • Artifact Builds
    • Codebase Overview
      • Account Configuration
      • Address Book
      • Chat Core
        • Notifications
        • Message Styles
        • Keyboard shortcuts
        • Chat Core Protocols
        • Contacts
      • Mail Front-End
    • Tutorials and Examples
      • Hello World Example
      • Thunderbird Live Development Videos
    • Fixing a Bug
      • Bug Triaging 101
        • Bug Status Classicification
        • Bug Types
        • Garbage Collection
        • Narrow the Scope
      • Using Mercurial Bookmarks
      • Using Mercurial Queues
      • Lint and Format Code
      • Using ESLint to Format Javascript Code
      • Try Server
      • Landing a Patch
      • Care and Feeding of the Tree
    • Testing
      • Running Tests
      • Adding Tests
      • Writing Mochitest Tests
  • Planning
    • Roadmap
    • Android Roadmap
    • Supported Standards
  • Add-on Development
    • Introduction
    • What's new?
      • Manifest Version 3
    • A "Hello World" Extension Tutorial
      • Using WebExtension APIs
      • Using a Background Page
      • Using Content Scripts
    • A Guide to Extensions
      • Supported Manifest Keys
      • Supported UI Elements
      • Supported WebExtension APIs
      • Thunderbird's WebExtension API Documentation
      • Thunderbird WebExtension Examples
      • Introducing Experiments
    • A Guide to Themes
    • Developer Community
    • Documentation & Resources
      • Tips and Tricks
    • Add-on Update Guides
      • Update for Thunderbird 128
      • Update for Thunderbird 115
        • Adapt to Changes in Thunderbird 103-115
      • Update for Thunderbird 102
        • Adapt to Changes in Thunderbird 92-102
      • Update for Thunderbird 91
        • Adapt to Changes in Thunderbird 79-91
      • Update for Thunderbird 78
        • Adapt to Changes in Thunderbird 69-78
      • Update for Thunderbird 68
        • Adapt to Changes in Thunderbird 61-68
      • How to convert legacy extensions?
        • Convert wrapped WebExtensions to modern WebExtensions
        • Convert legacy WebExtensions to modern WebExtensions
        • Convert legacy overlay extension to legacy WebExtension
        • Convert legacy bootstrapped extension to legacy WebExtension
  • Releases
    • Thunderbird Channels
    • Release Cadence
    • Uplifting Fixes
    • Feature Flags
    • Tracking Fixes for Releases
    • Contributing to Release Notes
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  1. Releases

Thunderbird Channels

Thunderbird provides releases through four distinct channels, each serving a unique purpose. Below are the channels, their corresponding branches, and a summary of their purpose:

  • Thunderbird Daily (comm-central): Where development and testing begin, and new features are developed.

  • Thunderbird Beta (comm-beta): The monthly stabilization release.

  • Thunderbird Release (comm-release): The official monthly release.

  • Thunderbird ESR (comm-esr): The official annual extended support release.

These four channels offer increasing levels of stability, increasing as code moves from Daily to Beta and being the highest in Release and ESR.

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Last updated 3 months ago

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