Firefox is no longer supported on Windows 8.1 and below.
Please download Firefox ESR (Extended Support Release) to use Firefox.
Download Firefox ESR 64-bit
Download Firefox ESR 32-bit
Firefox is no longer supported on macOS 10.14 and below.
Get the not-for-profit-backed browser on Windows, Mac or Linux.
Get the customizable mobile browser for Android smartphones.
Get the mobile browser for your iPhone or iPad.
Simply private mobile browsing.
Learn how Firefox treats your data with respect.
Read about new Firefox features and ways to stay safe online.
Get the details on the latest Firefox updates.
View all Firefox Browsers
See if your email has appeared in a company’s data breach.
Help prevent Facebook from collecting your data outside their site.
Save and discover the best stories from across the web.
Get protection beyond your browser, on all your devices.
Learn how each Firefox product protects and respects your data.
Sign up for new accounts without handing over your email address.
New features and tools for a customized MDN experience
View all Products
Learn about the values and principles that guide our mission.
Meet the not-for-profit behind Firefox that stands for a better web.
Join the fight for a healthy internet.
Stories about how our people and products are changing the world for the better.
Meet the team that’s building technology for a better internet.
Work for a mission-driven organization that makes people-first products.
Learn about Mozilla and the issues that matter to us.
More About Mozilla
Gather in this interactive, online, multi-dimensional social space.
Get the Firefox browser built just for developers.
Check out the home for web developer resources.
Donate your voice so the future of the web can hear everyone.
Discover ways to bring bright ideas to life.
— English (US)
Your system may not meet the requirements for Firefox, but you can try one of these versions: