The latest Firefox engine: Firefox Quantum

Firefox Quantum was a revolution in Firefox development. In 2017, we created a new, lightning fast browser that constantly improves. Firefox Quantum is the Firefox Browser.

Download Firefox

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

Download a different build

Firefox is no longer supported on macOS 10.14 and below.

Please download Firefox ESR (Extended Support Release) to use Firefox.

Download Firefox ESR
Firefox Privacy Notice

Learn more about Firefox Quantum

    Privacy first

    Firefox doesn’t spy on you online. We stop many known third-party tracking cookies and give you full control.

    Super Fast

    Get speed and security. Firefox is fast because we don’t track your moves.

    Always evolving

    Find out about all the amazing Firefox features.