• Skip to main content
  • Skip to search
  • Skip to select language
    • Technologies Overview
    • HTML
    • CSS
    • JavaScript
    • Graphics
    • HTTP
    • APIs
    • Browser Extensions
    • MathML
    • Learn web development
    • Tutorials
    • References
    • Developer Guides
    • Accessibility
    • Game development
    • ...more docs
    • Send Feedback
    • Contribute to MDN
    • Report a content issue 🌐
    • Report a platform issue 🌐
  1. MDN Web Docs Glossary: Definitions of Web-related terms
  2. Mozilla Firefox
  • Change language

Table of contents

  • See also

Mozilla Firefox

Mozilla Firefox is a free open-source browser whose development is overseen by the Mozilla Corporation. Firefox runs on Windows, OS X, Linux, and Android.

First released in November 2004, Firefox is completely customizable with themes, plug-ins, and add-ons. Firefox uses Gecko to render webpages, and implements both current and upcoming Web standards.

See also

  • Mozilla Firefox official website
  • Firefox developer documentations on MDN

Found a problem with this page?

  • Edit on GitHub
  • Source on GitHub
  • Report a problem with this content on GitHub
  • Want to fix the problem yourself? See our Contribution guide.

Last modified: Oct 8, 2021, by MDN contributors

Change your language
  • Web Technologies
  • Learn Web Development
  • About MDN
  • Feedback
  • About
  • MDN Web Docs Store
  • Contact Us
  • Firefox

MDN

  • MDN on Twitter
  • MDN on Github

Mozilla

  • Mozilla on Twitter
  • Mozilla on Instagram

© 2005-2022 Mozilla and individual contributors. Content is available under these licenses.

  • Terms
  • Privacy
  • Cookies