Mozilla ORG

PDF Reader in JavaScript

PDF.js is a Mozilla open-source JavaScript library that lets web browsers display PDF files using only standard web technologies, no plugins, no Adobe Reader, no extra software required.

DeepSpeech is an open source embedded (offline, on-device) speech-to-text engine which can run in real time on devices ranging from a Raspberry Pi 4 to high power GPU servers.

DeepSpeech was Mozilla's open-source offline speech-to-text engine that ran entirely on-device, even on a Raspberry Pi, but is now discontinued and no longer maintained.

Simple, private file sharing from the makers of Firefox

Firefox Send was Mozilla's end-to-end encrypted file sharing service where files were scrambled in the browser before upload so servers could never read them. The project is archived and no longer maintained.

A standalone version of the readability lib

Mozilla's JavaScript library that strips a webpage down to just its article text and images, the same code that powers Firefox's Reader View, available as a standalone package for your own projects.

:robot: :speech_balloon: Deep learning for Text to Speech (Discussion forum: https://discourse.mozilla.org/c/tts)

Mozilla TTS is a Python library that converts text into spoken audio using AI, it covers the full pipeline from text to audio file, supports over 20 languages, and lets you train custom voice models.

DEPRECATED - A HTML5/JavaScript multiplayer game experiment

A deprecated multiplayer browser game built entirely with HTML5 and JavaScript that demonstrated real-time multiplayer in a web browser without plugins or downloads.

A powerful templating engine with inheritance, asynchronous control, and more (jinja2 inspired)

A JavaScript templating engine from Mozilla that lets you build HTML pages with reusable layouts and variable data, inspired by Python's Jinja2. Works in Node.js and the browser.

WebDriver Classic proxy for automating Firefox through Marionette

A small Mozilla program that lets automated test scripts control the Firefox browser, it translates standard WebDriver testing commands into instructions Firefox understands.

Sccache is a ccache-like tool. It is used as a compiler wrapper and avoids compilation when possible. Sccache has the capability to utilize caching in remote storage environments, including various cloud storage options, or alternatively, in local storage.

Improved JPEG encoder.

DEPRECATED - Mozilla's new typeface, used in Firefox OS

a multi-language bindings generator for rust

Rhino is an open-source implementation of JavaScript written entirely in Java

SUPERSEDED by https://github.com/mozilla-firefox/firefox. Read-only Git mirror of the Mercurial gecko repositories at https://hg.mozilla.org

Shumway is a Flash VM and runtime written in JavaScript

Firefox Multi-Account Containers lets you keep parts of your online life separated into color-coded tabs that preserve your privacy. Cookies are separated by container, allowing you to use the web with multiple identities or accounts simultaneously.

A command line tool to help build, run, and test web extensions

A lightweight polyfill library for Promise-based WebExtension APIs in Chrome

A project for generating C bindings from Rust code

Bleach is an allowed-list-based HTML sanitizing library that escapes or strips markup and attributes

Featureful configuration management library for Node.js

Neqo, the Mozilla Firefox implementation of QUIC in Rust

DEPRECATED - MozDef: Mozilla Enterprise Defense Platform

A very simple way to find out which SSL ciphersuites are supported by a target.

INACTIVE - HTTP Holder-Of-Key Authentication Scheme

Mozilla HTTP Observatory

Persona is a secure, distributed, and easy to use identification system.

Keep your email safe from hackers and trackers. Make an email alias with 1 click, and keep your address to yourself.

UNMAINTAINED A persistent, relational store inspired by Datomic and DataScript.

Mozilla's Localization Platform

Platform for Mozilla Support

UPDATE: This project is no longer maintained. Please check out Glitch.com instead.

Rust tool to collect and aggregate code coverage data for multiple source files

Making mozilla.org awesome, one pebble at a time

Generic build of PDF.js library.

Policy Templates for Firefox

No description.

Server Side TLS Tools have moved

Our repository for Diversity, Equity and Inclusion work at Mozilla

Facebook Container isolates your Facebook activity from the rest of your web activity in order to prevent Facebook from tracking you outside of the Facebook website via third party cookies.

supply-chain security for Rust

Mozilla Monitor arms you with tools to keep your personal information safe. Find out what hackers already know about you and learn how to stay a step ahead of them.

🕶 addons.mozilla.org Django app and API 🎉

Examples of how to use or integrate DeepSpeech

secure sessions stored in cookies

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Monorepo for Mozilla Accounts (formerly Firefox Accounts)

Firefox Application Services

Project Tofino is a browser interaction experiment.

Content Security Policy for Django.

a experimental, Electron-compatible runtime on top of Gecko

Platform for Machine Learning projects on Software Engineering

Front-end to complement mozilla/addons-server

GeckoView is a set of components for embedding Gecko in Android apps

Theming demo for Firefox Quantum and beyond

Cross platform audio library

Modern cross-platform telemetry

Parser for ISO Base Media Format aka video/mp4 written in Rust.

Library to analyze and collect metrics on source code

DEPRECATED - Mozilla Open Design aims to bring open source principles to Creative Design. Find us on Matrix: chat.mozilla.org/#/room/#opendesign:mozilla.org

INACTIVE - http://mzl.la/ghe-archive - Firefox Developer Tools protocol adapters (Unmaintained)

Functional reactive UI library

🔍 Firefox Add-ons linter, written in JavaScript. 👁

A simple, humane, typed key-value storage solution.

Bigquery ETL

FxEmojis - a friendly emoji set from Mozilla

The code, training pipeline, and models that power Firefox Translations

Rust library to interact with Security Keys, used by Firefox

A system for managing CI data for Mozilla projects

DEPRECATED - A Javascript library for parsing metadata on a web page.

A polyfill and example code for building augmented reality (AR) and virtual reality (VR) applications using WebXR.

INACTIVE - The Mozilla Project uses GitHub!

Break Page Visibility API and Fullscreen API so video plays in background

Model Context Protocol server for Firefox DevTools - enables AI assistants to inspect and control Firefox browser through the Remote Debugging Protocol

Airflow configuration for Telemetry

EXPERIMENTAL - copy of comm-central for forking on github

Network Security Services (NSS)

A Vec That Has a Smaller size_of

Rewrite of breakpad dump_syms tools in Rust

Compact certificate revocation lists for the WebPKI

A web application for managing user experiments for Mozilla Firefox.

Mozilla and GSOC 2020

INACTIVE - http://mzl.la/ghe-archive - Proposals for future Firefox browser architecture

☂ Umbrella repository for Mozilla Addons ✨

Firefox Extension Workshop

a REST only mail server for ephemeral email addresses

Guidelines, principles published on https://infosec.mozilla.org

Web index for Mozilla data tools and docs

Documentation and implementation of telemetry ingestion on Google Cloud Platform

INACTIVE - http://mzl.la/ghe-archive - Specifications for Mozilla's Identity Effort

Easy to use download tool and API for different types of Firefox and Thunderbird builds

INACTIVE - Bergamot translator

DEPRECATED project - Check the Marionette framework instead

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Automated static analysis & linting bot for Mozilla repositories

A Mozilla release management tool to send reminders to Firefox developers and improve Bugzilla metadata

A powerful AI-powered web automation tool that helps you get answers and take actions in the browser.

Looking Glass is a collaboration between Mozilla and the makers of Mr. Robot to provide a shared world experience.

Improved Performance Comparison Tool

Machine learning job scheduler

WebM demuxer

Depending on the platform, bump a thread priority so that it's suitable for real-time audio

Aggregated audits for Rust crates by Mozilla

DEPRECATED - Test Suite for Firefox using Mozilla Iris

Parse various sources (hg log, apis, crashes…) to get some insights on past releases such as uplifts per beta, top crash signatures per nightly…

Documentation Hub for Firefox Accounts, Sync Client Integrations and More

Firefox extension to chase the memory usage and garbage collector activity

Base utilties for mozilla test harnesses

The audio backend of Firefox on Mac OS X.

Mirror of https://hg.mozilla.org/hgcustom/version-control-tools

Rust crate for obtaining the local network interface name and MTU towards a given IP address

translated strings for Firefox accounts website

Release notes and system requirements for our various Firefoxen

Mozilla's primary interactive dashboard for examining the distribution of telemetry values.

This machine kills superstition. 💨

Generates mappings between IANA TLS hex values and their corresponding cipher names in GnuTLS, NSS, and OpenSSL

Explainers from Mozilla contributors

Scrape and publish Telemetry probe data from Firefox

LookML Generator for Glean and Mozilla Data

Canonical source for Mozilla Foundation Security Advisories. http://www.mozilla.org/security/announce/

No description.

Collection of dockerized ETL jobs managed by data engineering.

Delivering data to Firefox

using Persona from an iOS app

Central hub for metric definitions that are considered the source of truth

Some tools for supporting OneCRL

Hub for Mozilla Looker models

No description.

The canonical source of Mozilla community data including contributors and forums.

Website about the Mozilla-run Common CA Database

INACTIVE - http://mzl.la/ghe-archive - Mozilla's Developer Roadshow 2017

Node API to control Firefox

Jira Bugzilla Integration (JBI) - system to sync bugs and issues

Tools for parsing the metadata for Mozilla's glean telemetry SDK

Cross-SRE Terraform modules

Automations of Fx Desktop release smoke tests

An optimized version of the classify client endpoint in Normandy

A library for creating full representations of Mozilla telemetry pings.

Design assets for Protocol, Mozilla’s design system.

Library to access and aggregate several Mozilla data sources.

Default repository for Looker spoke projects

Python and JavaScript tools for working with Mozilla localization files

Cubeb Audio Remoting For Gecko

DAGs collection for telemetry-airflow

Deprecated - please see https://github.com/mozilla/firefox-public-data-report-etl for the current ETL powering Firefox Public Data Report

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🛠 Various addons related helpers to build scanners.

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Admin reference for Firefox as an enterprise browser, including policy documentation and guides.

Documentation hub for Experimenter/Nimbus

This repository contains code for sending metadata from Mozilla-specific platforms to a DataHub instance.

A collection of automated tests created with the scope of reducing manual testing for the AMO weekly release.

State machine implementation of Happy Eyeballs v3 in Rust

⛑ ESLint plugin for AMO.

Respository to hold various performance data that is hosted on the performance dashboard.

Shared eslint config for all amo related js projects

Blog content builder for AMO

Dashboard of bug lists for Firefox-related components in Bugzilla, with a focus on triage and release tracking.

Web-frontend for Firefox performance data.

A marketplace for distributing AI agent plugins to Firefox developers

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Images for inclusion within product release notes on www.mozilla.org

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WebGPU Conformance Test Suite

improving search experience

Client for the snakepit machine learning job scheduler

Turn Claude Code into a data analyst on sql.telemetry.mozilla.org

Git export of Remote Settings data

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Dashboard showing how long Firefox test jobs take to complete.

yaml -> nginx for redirects and rewrites

Media Triage Dashboard

Curated content sharing in firefox

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Hosting product details json files for mozilla vpn repo

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nss-rs provides a safe and idiomatic Rust interface to NSS

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Git export of Remote Settings DEV data

Git export of Remote Settings STAGE data

Tool to help to find patches which are potentially responsible of a crash

Orchestrates the RAG to answer business questions using BigQuery data: Retrieve relevant data → Augment the analysis with this data → Generate grounded answer.

This is a Mozilla fork of yara-x for our own custom needs.

Integration between wagtail-localize and Smartling's API

Reusable Helm templates for Kubernetes

Repository for performance-related static dashboards.

GitHub actions shared by various Mozilla projects

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Mozilla's zero-effort key value store for modernizing Firefox's storage stack.

The official development repository of Mozilla's Firefox web browser.

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This repository is for testing migration of hg->git. It is not (yet) an official repository for Thunderbird.

personal sandbox

Experimental project tracking agent development

Repo which contains the Github actions used in the Secure Software Development Lifecycle (SSDLC) workstreams

Builds Mozilla's patched openresty-oidc container image. A thin wrapper around the upstream OpenResty Alpine image with lua-resty-openidc preinstalled, intended as a drop-in base for services terminating OpenID Connect at an OpenResty/NGINX reverse proxy.

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During Growth Work Week 2026, we created a rough demo for annotated single-link sharing, and this is a summary of what we made.