Mozilla Firefox

by Mozilla · Web browsers

Open sourceWindowsMacLinux

Independent, open-source web browser from the non-profit Mozilla.

Official download from mozilla.org (opens in a new tab)

Opens mozilla.org, Mozilla's own site. No mirror, no bundle.

Overview

What is Mozilla Firefox?

Firefox is one of the few major browsers not built on Chromium. It ships with tracking protection switched on, supports a large add-on library and syncs bookmarks, passwords and tabs through a free Mozilla account.

Key features

  • Enhanced Tracking Protection on by default
  • Container tabs to separate logins
  • Built-in screenshot and PDF editing
  • Large add-on library

Best for

  • Privacy-minded everyday browsing
  • Web developers testing in a non-Chromium engine
  • People who want vertical tabs and deep customisation

Included in starter kits

Install

How to install Mozilla Firefox

  1. 1Open the official Mozilla Firefox download page on mozilla.org.
  2. 2Pick the build for your system (Windows, Mac, Linux; check x64, ARM or Apple silicon where offered).
  3. 3Run the installer and read each screen; decline anything you did not ask for.
  4. 4Keep it updated from the app's own updater or your package manager.

Install from the command line

  • Windows · winget

    winget install --id Mozilla.Firefox -e --source winget

  • Mac · Homebrew

    brew install --cask firefox

  • Linux · Flatpak (Flathub)

    flatpak install flathub org.mozilla.firefox

Package IDs checked against the public winget, Homebrew and Flathub repositories on 1 Nov 2026. Build a script for several apps.

Safety

Download Mozilla Firefox safely

  • Check the domain

    The real download lives on mozilla.org. Look-alike domains and search ads are the most common trap.

  • Skip mirrors

    Download portals can wrap installers in adware or old versions. You never need them for this app.

  • Verify if you can

    If the publisher lists a checksum, compare it with our in-browser checker before running the file.

  • Watch the installer

    Untick extras, browser changes or trials you did not ask for.

Open the checksum checker

Alternatives

Mozilla Firefox alternatives

Other web browsers apps, closest platform match first.

All browsers

FAQ

Mozilla Firefox questions

Where can I download Mozilla Firefox safely?

Download Mozilla Firefox only from Mozilla's official site at mozilla.org. Avoid mirror and "download portal" sites, which can bundle extra software with the installer.

Is Mozilla Firefox free?

Yes. Mozilla Firefox is open-source software and free to use.

Does Mozilla Firefox work on Windows, Mac and Linux?

Mozilla Firefox is available for Windows, Mac, Linux. Check Mozilla's download page for exact system requirements and whether your processor (x64, ARM or Apple silicon) is supported.

Can I install Mozilla Firefox from the command line?

Yes, with winget on Windows (winget install --id Mozilla.Firefox -e); Homebrew on Mac (brew install --cask firefox); Flatpak on Linux (flatpak install flathub org.mozilla.firefox). Package managers fetch the publisher's files and make updates easy.

What are good alternatives to Mozilla Firefox?

See the alternatives section on this page and the full web browsers list on AltFTool, which shows each app's licence and platforms side by side.