Download Mozilla Firefox for Windows, a free web browser. Firefox is created by a global not-for-profit dedicated to putting individuals in control online. Get Firefox for Windows today!

Get Firefox for Windows, Mac or Linux. Firefox is a free web browser backed by Mozilla, a non-profit dedicated to internet health and privacy.

Firefox version 115 is the last supported Firefox version for users of Windows 7, Windows 8 and Windows 8.1. If you have been using Firefox on these versions of Windows, you will be moved to the Firefox Extended Support Release (ESR) channel by an application update.

If you need to run 32-bit Firefox or manually install 64-bit Firefox, you can simply download and re-run the Windows (32-bit or 64-bit) Firefox installer from the Firefox platforms and languages download page.

2025年1月4日 · This article explains how to install Firefox on Windows, either with a simple online installer from Mozilla or from the Microsoft Store. If you need a full, offline installer with custom options, see Custom installation of Firefox on Windows .

If you still want to downgrade, you can visit Mozilla's directory of older Firefox versions using the links below. Please note, however, that using older versions can make Firefox insecure and more vulnerable to attacks and scams. We recommend that …

Join the hundreds of millions of people who choose to protect what's important by using Firefox, a web browser designed to be fast, private and safe. FAST. PRIVATE. SAFE. Firefox browser gives you lightning-fast page loads and effortless privacy protection.