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.

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!

Firefox automatically blocks 2000+ online trackers from collecting information about what you do online. Learn more. Take the same level of privacy — plus your passwords, search history, open tabs and more — with you wherever you go. Learn more. Get unmatched data protection with support cycles tailored to suit your company’s needs.

Mozilla Firefox, or simply Firefox, is a free and open source [12] web browser developed by the Mozilla Foundation and its subsidiary, the Mozilla Corporation. It uses the Gecko rendering engine to display web pages, which implements current and anticipated web standards. [13] .

Get a sneak peek at the latest Firefox browser features before they’re released. Test your sites against soon-to-be-released Firefox browser features with powerful, flexible DevTools that are on by default. The pre-alpha version for power users who like to hunt crashes and test new features as they’re coded.

Jul 30, 2024 · Most problems with Firefox can be fixed by following the troubleshooting methods described below. Try these steps in order. If one doesn't work, move on to the next one. If you need extra help with any of this, we have a community of volunteers standing by. 1. Restart your computer. 2. Clear your cookies and cache. 3.

Sep 1, 2023 · This article explains what to do if the Firefox window does not open or you get an error message when you try to start Firefox.

Learn all you need to know to get started with Firefox. Grow and share your expertise with others. Answer questions and improve our knowledge base. Learn More. What Is It? Visit Mozilla Corporation’s not-for-profit parent, the Mozilla Foundation. Portions of this content are ©1998–2025 by individual mozilla.org contributors.

Jul 4, 2024 · Can't open Firefox on your computer? Apply these troubleshooting tips to resolve Firefox not opening issue on Windows 10 and Windows 11.

May 14, 2024 · Go to the Windows Start menu and click the Settings icon. Click Apps, then choose Default Apps on the left. Scroll down and click the entry under Web browser. Click on Firefox in the dialog that opens with a list of available browsers. Firefox is now set as your default browser. Close the Settings window to save your changes.