Mozilla Firefox
FreeFree, open-source browser from Mozilla with strong tracking protection, available on desktop and mobile.
About Mozilla Firefox
Firefox is an open-source web browser developed by the Mozilla Foundation's subsidiary, Mozilla Corporation. It uses its own Gecko engine rather than Chromium, which makes it one of the few independent browser engines left. It runs on Windows, macOS, Linux, Android and iOS.
Firefox is known for its privacy features, including Enhanced Tracking Protection, container tabs and a wide range of settings that can be adjusted without extensions. A Firefox account syncs bookmarks, history, passwords and open tabs between devices, and the add-on catalogue covers most common needs such as content blockers and password managers.
It suits people who want a mainstream browser that is not built on Chromium, who value open-source software, or who like to customise the interface. Firefox is free to use and the source code is licensed under the Mozilla Public License. Mozilla funds development mostly through search partnerships and optional paid services. Some sites are tested mainly against Chromium, so you may occasionally hit a compatibility quirk.
A good choice if you want to avoid Chromium. If a site misbehaves, check that content blockers are not the cause before blaming the browser.
Version history
2 releases tracked- Windows: Fixed macOS download failures when save permission is missing
- Fixed the sidebar sticking on Bookmarks or AI Chatbot
- Security fix
- iOS: Behind-the-scenes updates for steady and responsive browsing
Frequently asked
Is Firefox free?
Yes. It is free and open source.
Do I need an account?
No. A Firefox account is only needed for sync.
Which platforms does it support?
Windows, macOS, Linux, Android and iOS.
Where does the download link go?
Directly to mozilla.org or the official app store for your platform. PlanetSofts never rehosts installers or adds wrappers, and these links were last verified Oct 6, 2026.