Firefox Front-end

This is the nascent documentation of the Firefox front-end code.

• Address Bar
  • Where to Start
  • Codebase
  • Table of Contents
  • API Reference
• Browser Usage Telemetry
  • Tab and window interactions
  • Customizable UI
  • Profile Count
  • Context menu entrypoints
• Command Line Parameters
  • Known parameters
• Enterprise Policies
  • Introduction
  • Kiosk Mode
• Form Autofill
  • Introduction
  • Debugging
  • Contents
  • Report Issues
• Firefox Home (New Tab)
  • For .jsm or .sys.mjs files (system modules)
  • For .js, .jsx, .scss, or .css files
  • Building assets and running Firefox
  • Continuous development / debugging
  • Running tests
  • Code Coverage
  • Detailed Docs
• Installer
  • Installer Build
  • Stub Installer
  • Full Installer
  • MSI Package
  • MSIX Package
  • Helper
• Installation Attribution
  • Firefox Windows Installers
  • Microsoft Store
• Default Browser Agent
  • Scheduled Task
  • Data Management
• Migration
  • MigrationUtils Reference
  • Migrators Reference
  • Migration Wizard Reference
• PageDataService
  • PageData Data Structure
  • PageData Collection
  • Supported Types of page data
• Places
  • History and Bookmarks
  • Where to Start
  • Governance
  • Table of Contents
• Messaging System
  • Vision
  • What does Messaging System support?
  • Messaging System Overview
  • Message Routing
  • UI Templates
  • Detailed Docs
• Search
  • Application Search Engines
  • Preferences
  • Telemetry
• tabbrowser
  • gBrowser
• Touch Bar
  • Overview
  • JavaScript API
  • Cocoa API
• UITour
  • UITour library API
  • Mozilla.UITour
• Firefox Branding
  • Additional reading
• Storybook for Firefox
  • Background
  • Running Storybook
  • Updating Storybook dependencies
  • Adding new stories
• Reusable UI widgets
  • Background
  • Designing new reusable widgets
  • Adding new design system components
  • Common pitfalls
• Other types of UI Widgets
  • Older custom elements in toolkit/widgets
  • Domain-specific Widgets
• Lit
  • Background
  • Using Lit
  • Writing components with Lit
• XUL and HTML
  • What is XUL
  • What requires XUL
  • When to use HTML or XUL
  • Mixing HTML and XUL