Firefox Project

Firefox is created by thousands of people around the world working together to build a better Internet. If you're already a member of the community, thank you for everything you've done. If you're new to Mozilla, feel free to get involved—you don’t have to be a C++ guru (or even know what that means!) to contribute.

Release Channels

Try using one of the following versions to help us test and improve the stability, security and functionality of Firefox.

• Nightly: Desktop, Mobile
• Aurora: Desktop
• Beta: Desktop, Mobile
• Current Release: Desktop, Mobile

Historical Releases

Information about older versions are available for historical interest, but these releases are not safe for regular use because they are no longer receiving security updates.

• Firefox 4.0 (Tumucumaque)
• Firefox 3.6 (Namoroka)
• Firefox 3.5 (Shiretoko)
• Firefox 3.0 (Gran Paradiso)
• Firefox 2.0 (Bon Echo)
• Firefox 1.5 (Deer Park)
• Firefox 1.0 (Phoenix)

Other History

• History of Firefox
• Screenshots of different Firefox versions
• Historical view of browser usage
• Firefox Development Charter