Mozilla Firefox

Firefox is a free, open-source {{Glossary("Browser","web browser")}} developed by the Mozilla Corporation. Firefox is available for Windows, macOS, Linux, Android, and iOS.

First released in November 2004, Firefox is customizable with themes, plugins, and add-ons. Firefox uses the {{glossary("Gecko")}} rendering engine to display web pages and implements both current and upcoming {{glossary("world wide web", "web")}} standards.

Download Firefox

Firefox is available on multiple platforms and comes in different versions for different user needs.

Users

Use these links to download Firefox for different platforms, devices, or deployment needs:

• Desktop
• Android
• iOS
• Firefox for Enterprise

Web developers

If you want to try the latest Firefox features, install one of the pre-release builds:

• Firefox Developer Edition
• Firefox Nightly
• Firefox Beta

See also

• Firefox on Wikipedia
• Firefox Release Notes
• Firefox Source Docs
• Firefox developer documentation on MDN Web Docs
• SpiderMonkey JavaScript and WebAssembly engine
• Mozilla Standards Positions
• Report Firefox bugs
• Related glossary terms:
  • {{glossary("Browser")}}
  • {{glossary("Gecko")}}
  • {{Glossary("Engine/Rendering", "Rendering engine")}}
  • Other browsers: {{glossary("Apple Safari")}}, {{glossary("Google Chrome")}}, {{glossary("Microsoft Edge")}}, {{glossary("Opera Browser")}}