Mozilla Firefox

Name: Mozilla Firefox
Author: Mozilla

Open source

Mozilla

Category: Browsers
Version: 155.0.1
Size: ~88 MB
Licence terms: Open source (MPL 2.0) · free
Supported OS: Windows 11 · 10
Install method: Automatic install supported
Developer: Mozilla
Downloads via this site

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What it is

An open-source browser from the Mozilla Foundation. It is effectively the only major browser not built on Chromium — it uses its own Gecko engine — and tracking protection is on by default. Many people choose it specifically to keep an alternative engine alive while Chromium dominates the market.

When to pick this

If privacy matters to you or you want to avoid a Chromium-only web. If you depend on a Chrome extension that has no Firefox version, check that first.

Details

Enhanced tracking protection

Ad trackers, social trackers and cookie-based tracking are blocked out of the box, with no extension required.

Container tabs

Cookies are isolated per tab, so you can be signed in to the same site with several accounts at once — handy for separating work and personal accounts.

Independent engine

Sites built only against Chromium occasionally render differently. It is rare now, but it does happen.

Distribution

winget ID: Mozilla.Firefox
Redistribution policy: Open source licence
Last checked: 2026-09-09
Official site: https://www.mozilla.org/firefox/