Firefox is the fast, lightweight, privacy-focused browser that works across all your devices.

Mozilla Firefox® is a fast, full-featured web browser that's easy to use. It has lots of great features including popup-blocking, tabbed-browsing, integrated search, improved privacy features, automatic updating and more. Plus, thanks to the PortableApps.com launcher bundled in the Mozilla Firefox, Portable Edition, it leaves no personal information behind on the machine you. Note: This program is advertising supported and may offer to install third party programs that are not required. These may include a toolbar, changing your homepage.

A better internetting experience

• Mozilla Firefox 40 free download - Mozilla Firefox Portable, Mozilla Firefox Beta, Mozilla Firefox (64-bit), and many more programs.
• Visit Mozilla Corporation’s not-for-profit parent, the Mozilla Foundation. Portions of this content are ©1998–2021 by individual mozilla.org contributors. Content available under a Creative Commons license.

Browse faster

Firefox uses less memory than Chrome, so your other programs can keep running at top speed.

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Your favorite extensions

Add powerful functions, useful features and even a little fun to your Firefox browser.

See all extensions

Balanced memory

Firefox uses just enough memory to create a smooth experience so your computer stays responsive to other tasks.

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More powerful Private Browsing

Private Browsing mode deletes cookie data and your browsing history every time you close it.

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Ad tracker blocking

Firefox automatically blocks 2000+ ad trackers from following you around the internet.

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Password manager

Firefox Lockwise lets you access all the passwords you’ve saved in Firefox — and it’s free.

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Customize your browser

Give your browser the look you want with thousands of different themes.

See top themes

Sync between devices

Make sure all your important stuff — internet searches, passwords, open tabs — appears where you need it on every device.

Get a Firefox Account

Better bookmarks

Use the bookmark star icon to stay organized and add custom names and folders quickly.

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Fingerprinter Blocking

Fingerprinting is a type of online tracking that’s more invasive than ordinary cookie-based tracking — that’s why Firefox Browser blocks it.

Block fingerprinters

Translate the web

Translate from more than 100 languages to your language directly in your Firefox Browser - easier than ever.

Translate to your language

Picture-in-Picture

Got things to do and things to watch? Do both using Picture-in-Picture in Firefox.

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From a company that puts people before profit

Open source. Open minds.

Mozilla creates powerful web tech for everyone.

See what makes us different

By not-for-profit, Mozilla

On a mission to keep the internet open and accessible to all.

Read Mozilla’s mission

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Keep corporate power in check

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Firefox is the only major independent browser.

Choose independence

Private by default

Opted-in to privacy, so you can browse freely.

Read our privacy policy

Enhanced tracking protection

We don’t sell access to your online data. Period.

Get Firefox for privacy

Firefox vs. other browsers

See how Firefox stacks up against other popular browsers.

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