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Overview

  • A Glossary of Common Terms
  • A Quick Guide to Mozilla Applications

Getting Started

  • Getting Set Up To Work On The Firefox Codebase

Working On Firefox

  • Working on Firefox
  • Bug Handling

Firefox User Guide

  • Firefox DevTools User Docs

Source Code Documentation

  • Governance
  • Firefox Front-end
  • DOM
  • Editor
  • Style system (CSS) & Layout
  • Graphics
  • Processes, Threads and IPC
  • Firefox DevTools Contributor Docs
  • Toolkit
  • SpiderMonkey
  • JS Loader
  • GeckoView
  • Fenix
  • Focus for Android
  • WebIDL
  • libpref
  • Networking
  • Remote Protocols
  • Services
  • Permissions
  • File Handling
  • Firefox on macOS
  • Firefox on Windows
  • Firefox AI Runtime
  • Accessibility
  • Media Playback
  • Code quality
  • Writing Rust Code
  • Rust Components
  • Gecko Profiler
  • Performance
  • Database bindings (SQLite, KV, …)
  • XPCOM
  • NSPR
  • Network Security Services (NSS)
  • Web Security Checks in Gecko

The Firefox Build System

  • Mach
  • Pushing to Try
  • Build System
  • Firefox CI and Taskgraph
  • Managing Documentation
  • Vendoring Third Party Components

Testing & Test Infrastructure

  • Automated Testing
  • Understanding Treeherder Results
  • Sheriffed intermittent failures
  • Turning on Firefox tests for a new configuration
  • Avoiding intermittent tests
  • Testing Policy
  • Configuration Changes
  • Browser chrome mochitests
  • Chrome Tests
  • Marionette
  • geckodriver
  • Test Verification
  • WebRender Tests
  • Mochitest
  • XPCShell tests
  • TPS
  • web-platform-tests
  • GTest
  • Fuzzing
  • Sanitizer
  • Performance Testing
  • Code coverage
  • Testing & Debugging Rust Code

Releases & Updates

  • Mozilla Update Infrastructure
  • Watershed Updates
  • Desupport Updates
  • Update Verify

Localization & Internationalization

  • Internationalization
  • Localization
    • Localization
    • Fluent
      • Fluent for Firefox Developers
      • Guidelines for Fluent Reviewers
    • Migrating Strings From Legacy or Fluent Files
    • Single localization source for multiple builds
    • L10N Glossary

Firefox and Python

  • mozbase
  • Using third-party Python packages

Metrics Collected in Firefox

  • Metrics
Firefox Source Docs
  • Localization
  • Fluent
  • Report an issue / View page source

Fluent

Fluent is a localization system developed by Mozilla, which aims to replace all existing localization models currently used at Mozilla.

In case of Firefox it directly supersedes DTD and StringBundle systems, providing a large number of features and improvements over both of them, for developers and localizers.

  • Fluent for Firefox Developers
    • Using Fluent in Gecko
    • Major Benefits
    • Fluent Translation List - FTL
    • Social Contract
    • Markup Localization
    • Runtime Localization
    • Internationalization
    • Registering New L10n Files
    • Custom Localizations
    • Designing Localizable APIs
    • Testing
    • Manually Testing UI with Pseudolocalization
    • Testing other locales
    • Inner Structure of Fluent
  • Guidelines for Fluent Reviewers
    • Message Identifiers
    • Comments
    • Changes to Existing Messages
    • Non-text Elements in Messages
    • Message References
    • Terms
    • Variants and plurals
    • Access Keys
    • Linter
    • Migrating Strings From Legacy or Fluent Files

Other resources:

  • Fluent Syntax Guide

  • Fluent Wiki

  • Fluent.js Wiki

  • Fluent DOM L10n Tutorial

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