A faster, more secure and customizable Web browser.


The latest Firefox engine: Firefox Quantum. Firefox Quantum was a revolution in Firefox development. In 2017, we created a new, lightning fast browser that constantly improves. Firefox Quantum is the Firefox Browser.

  1. The new Mozilla Firefox Quantum is now released with a stable update. The new update comes with a version number 65.02. The updated Firefox Quantum is now available to download for Linux, Microsoft Windows, and Apple’s Mac systems. Mozilla is undoubtedly one of the best and popular web browser available for different systems.
  2. Mozilla Firefox 79 is a fast, secure and easy to use web browser.As it is powered by a new Quantum engine, Firefox has doubled its speed. And the result of that is the new generation of Web discovery - a more intuitive and useful browser.
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Mozilla Firefox (64-bit) - Mozilla Firefox is a fast, light and tidy open source web browser. At its public launch in 2004 Mozilla Firefox was the first browser to challenge Microsoft Internet Explorer’s dominance. Since then, Mozilla Firefox has consistently featured in the top 3 most popular browsers globally and this is set to continue thanks to the release of Firefox 30. The key features that have made Mozilla Firefox so popular are the simple and effective UI, browser speed and strong security capabilities. The browser is particularly popular with developers thanks to its open source development and active community of advanced users.

Easier Browsing

Mozilla put of a lot of resources into creating a simple but effective UI aimed at making browsing quicker and easier. They created the tab structure that has been adopted by most other browsers. In recent years Mozilla has also focused on maximizing browsing area by simplifying toolbar controls to just a Firefox button (which contains settings and options) and back/forward buttons. The URL box features direct Google searching as well as an auto predict/history feature called Awesome Bar. On the right side of the URL box there are bookmarking, history and refresh buttons. To the right of the URL box is a search box which allows you to customize your search engine options. Outside of that a view button controls what you see below the URL. Next to that you have the download history and home buttons.


Mozilla Firefox boasts impressive page load speeds thanks to the excellent JagerMonkey JavaScript engine. Start up speed and graphics rendering are also among the quickest in the market. Firefox manages complex video and web content using layer-based Direct2D and Driect3D graphics systems. Crash protection ensures only the plugin causing the issue stops working, not the rest of the content being browsed. Reloading the page restarts any affected plugins. The tab system and Awesome Bar have been streamlined to launch/get results very quickly too.


Firefox was the first browser to introduce a private browsing feature which allows you to use the internet more anonymously and securely. History, searches, passwords, downloads, cookies and cached content are all removed on shutdown. Minimizing the chances of another user stealing your identity or finding confidential information. Content security, anti-phishing technology and antivirus/antimalware integration ensures your browsing experience is as safe as possible.

Personalisation & Development

One of the best features of the Firefox UI is customization. Simply right click on the navigation toolbar to customize individual components or just drag and drop items you want to move around. The inbuilt Firefox Add-ons Manager allows you to discover and install add-ons within the browser as well as view ratings, recommendations and descriptions. Read about the top recommended add-ons for Mozilla Firefox on TechBeat. Thousands of customizable themes allow you to customize the look and feel of your browser. Site authors and developers can create advanced content and applications using Mozilla’s open source platform and enhanced API.

Fixed an incompatibility with Twitter.com manifesting itself with the intermittent display of a network protocol violation error page.

Windows 7/8/10/8.1

Download Firefox Quantum 64

A faster, more secure and customizable Web browser.
Explore the Web with optimized built-in smart tools for secured, ad-free browsing.
Internet Explorer is the world's most popular Web browser.

Quantum Browser For Windows 10

Navigate the Internet using browser with powerful search, sharing, and multimedia capabilities.
Flock delivers the latest webmail, photos, videos and updates from your favorites sites.
Try the alpha release of alternative lightweight customizable browser.
Innovative new features improve the way you view the web.

At Firefox, we know that you’re looking for the fastest web browser out there. You need to load web pages quickly and work at top speed. To make sure the Firefox Quantum (‘57) is the fastest Firefox yet, we ran some tests*.

The tests compared Firefox Quantum (57)’s speed and memory against previous versions of Firefox, and of Chrome. They found that while results varied based on your computer and the apps you’re using, Firefox Quantum was approximately 2x faster than any previous version of Firefox.

Firefox Quantum Download Mac

Test 1:
Conducted on September 19, 2017 using Surface Laptop (Processor: Intel Core i7 / Memory: 8GB / Storage: 256GB ), a new Firefox profile, and no other apps or tabs running.

TestFirefox 52Firefox Quantum (57) Beta
Test 13567
Test 23568
Test 33567
Test Average3567

Firefox Quantum (57.0 b1 64-bit)
Firefox 52 (52.0 64-bit)

Firefox Quantum Browser Download

Test 2
Conducted on September 20, 2017 using MacBook Pro (15-inch, 2016) (2.9GHz Intel Core i7 / 16GB 2133 MHz LPDDR3 / 1TB PCIe SSD ), a new Firefox profile, and no other apps or tabs running.

TestFirefox 52Firefox Quantum (57) Beta
Test 13367
Test 23265
Test 33165
Test Average3266

Firefox Quantum (57.0 b1 64-bit)
Firefox 52 (52.0 64-bit)

In addition to speed testing, Firefox’s “just right” multi-process architecture results in Firefox Quantum consuming roughly 30% less RAM than Chrome.

Download Firefox Quantum For Mac

To compare memory usage, the atsy project was used to load 30 pages, each in its own tab, with 10 seconds in between loads and 60 seconds of settle time at the end. Then memory usage was measured for the various processes that each browser spawns during that time.

Firefox Quantum Download For Mac

The new Firefox. Fast for good.

With 2x the speed, built-in privacy protection and Mozilla behind it, the new Firefox is the better way to browse. Get the new Firefox.

Mozilla is the not-for-profit behind Firefox, the original alternative browser. We create products and policy to keep the internet in service of people, not profit.