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Getting Started

  • Getting Set Up To Work On The Firefox Codebase

Working On Firefox

  • Working on Firefox
  • Bug Handling

Source Code Documentation

  • Firefox
  • DOM
  • Layout & CSS
  • Graphics
  • Firefox DevTools Contributor Docs
  • Toolkit
    • Add-on Manager
    • Crash Manager
    • Crash Reporter
    • Feature Gates
    • Search Service
    • Shield Recipe Client
    • Messaging System Schemas
      • Docs
      • Triggers and actions
        • User Actions
        • Trigger Listeners
    • Picture-in-Picture
    • Prompts
    • Subprocess Module
    • Telemetry
    • Firefox on Glean (FOG)
    • Toolkit Modules
    • Toolkit Widgets
    • URL Classifier
    • WebExtensions API Development
  • SpiderMonkey
  • Welcome to GeckoView’s documentation!
  • WebIDL
  • libpref
  • Remote Protocol
  • Services
  • File Handling
  • Firefox on macOS
  • Code quality
  • Writing Rust Code

The Firefox Build System

  • Mach
  • Try Server
  • Build System
  • TaskCluster Task-Graph Generation
  • Managing Documentation

Testing & Test Infrastructure

  • Testing Policy
  • Marionette
  • geckodriver
  • web-platform-tests documentation
  • Fuzzing
  • Sanitizer
  • Performance Testing
  • Code coverage
  • Testing & Debugging Rust Code

Localization & Internationalization

  • Internationalization
  • Localization

Firefox and Python

  • mozbase
  • Using third-party Python packages

Metrics Collected in Firefox

  • Metrics
  • Pings
Firefox Source Docs
  • »
  • Toolkit »
  • Messaging System Schemas
  • View page source

Messaging System Schemas¶

Docs¶

More information about Messaging System.

Triggers and actions¶

  • User Actions
    • Usage
    • How to update
    • Available Actions
  • Trigger Listeners
    • How to update
    • Usage
    • Available trigger actions
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