Table of contents

• 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

• Roadmaps
• 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
  • Updates for Thunderbird 140
  • 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