Firefox is a popular browser Mozilla application, available for multiple platforms, including Windows, Mac OS X and Linux on the desktop and Android mobile devices. With broad compatibility, the latest in Web technologies and powerful development tools, the Firefox browser is the largest for both end users and web developers.
Firefox is an open source project, the most of the code is contributed by our huge community of volunteers. Here you will learn about how to contribute to the Firefox project and you will also find links to information about the construction of Firefox add-ons, using the developer tools in Firefox, and other tasks.
Learn how to create add-ons for Firefox, how to develop and build Firefox itself, and how the internals of Firefox and its subprojects work.
- Developer release notes
Developer-focused release notes; learn what new capabilities for both Web sites and add-ons arrive in each version of Firefox.
- Project documentation
Get detailed information about the internals of Firefox and its build system, so you can find your way around in the code.
- Developer guide
Our developer guide provides details on how to get and compile the Firefox source code, how to find your way around, and how to contribute to the project.