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Firefox 55.0.3

Now with a new look, super speed and more awesomeness than ever!

Firefox is an open-source web browser which provides excellent browsing speed, rich suite of customization options to personalize your daily Internet sessions, clean navigation mode, as well as extensions provided by third-party developers for adding extra functions.

Firefox 55.0.3 full details

File Size: 43.00 MB
License: Freeware
Price: FREE
Released: 2017-08-28
Downloads: Total: 29316 | This Month: 70
Publisher: Mozilla Foundation
Publisher URL:

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User Rating: 3.7 (245 votes)

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Firefox 55.0.3 full description

Mozilla Firefox is a free and open source web browser developed for Windows, OS X, and Linux, with a mobile version for Android, by the Mozilla Foundation and its subsidiary, the Mozilla Corporation. Firefox uses the Gecko layout engine to render web pages, which implements current and anticipated web standards.

- Proudly non-profit
- Innovating for you
- Fast, flexible, secure

Bringing together all kinds of awesomeness to make browsing better for you. The Firefox browser is created by Mozilla, a non-profit organization whose mission is to promote openness, innovation and opportunity on the Web.

Firefox is available in over 70 languages, thanks to the contributions from Mozilla community members around the world.

Faster at what you do most

Trust isn’t made. It’s earned.

We build Firefox with a mission to put you first, above all else. We do it to keep you in control. We do it so you can browse without worry. And we do it because no one else will.

Firefox was named the ”speed king” in independent benchmark and performance tests against other browsers. Save time and do just about anything quicker than before.

Do Not Track
A Firefox innovation, Do Not Track lets you indicate a preference about the way your personal info is collected and used online.

Private browsing
Sometimes it’s nice to go undercover. Turn this feature on to protect your browsing history from others.

Forget Button
Remove browsing information from your computer after the fact. Use it when you’ve visited a site that you don’t want in your history.

Designed to be redesigned
Get fast and easy access to the features you use most in the new menu. Open the “Customize” panel to add, move or remove any button you want. Keep your favorite features — add-ons, private browsing, Sync and more — one quick click away.

Keep your Firefox in Sync
Access your bookmarks, history, passwords and more from any device to make Firefox your own wherever you use it.

Faster than ever
This is the fastest Firefox yet. It excels at both technical benchmarks and the everyday tasks that you do most.

The “speed king”
Firefox outperformed other browsers in recent independent tests to be named the “speed king.” So you can browse with confidence with the fastest on the Web.

Cutting-edge speed

If you enjoy games, you can now play some of your favorites right on the Web without sacrificing speed or overall performance. Firefox is leading the charge in online gaming as part of our efforts to make every aspect of your browsing experience faster.

Speed you can feel

We optimize Firefox for the way you use the Web. So things like opening or switching between tabs and getting results from the Awesome Bar happen faster than ever. Get where you need to go as quickly and easily as possible.

Do Not Track

Mozilla is a global, nonprofit organization dedicated to making the Web better. We emphasize principle over profit, and believe that the Web is a shared public resource to be cared for, not a commodity to be sold. We answer to no one but you and believe it is crucial to put you in control of your online experience. We are aiming to give you better insight and control into the ways your personal information is collected, used, stored and shared online.

Mozilla Firefox offers a Do Not Track feature that lets you express a preference not to be tracked by websites. When the feature is enabled, Firefox will tell advertising networks and other websites and applications that you want to opt-out of tracking for purposes like behavioral advertising.

Do Not Track is a step toward putting you in control of the way your information is collected and used online. Do Not Track is a feature in Firefox that allows you to let a website know you would like to opt-out of third-party tracking for purposes including behavioral advertising.

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Firefox 55.0.3 Windows 7 release notes

New Release
Bug 1391297 - Update MAR to sha384 past 56.0b4 in update-packaging Makefile.
Bug 1390002 - There are some paths to find out if dwrite is enabled, which inits gfxPlatform, which requires information from PopulateScreenInfo, which depends on the refresh driver existing. At this time however, we haven't initialized our vsync source so we crash. This moves vsync initialization earlier in the gfx pipeline.
Bug 1388166 - Handle case where chromeWin.getBrowser() doesn't exist.
Bug 1350152 - Don't rely on gBrowser in nsLoginManagerPrompter. In bug 1266836 we fixed this code to properly work in e10s, but made the mistake of using gBrowser in toolkit code, breaking XUL apps that don't have a gBrowser. This solution implements a different code-path for non-e10s and returns a chrome window for consumers that don't offer a browser.
[ Firefox release history ]
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Firefox for Windows 7 - Copyright information

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Using warez version, crack, warez passwords, patches, serial numbers, registration codes, key generator, pirate key, keymaker or keygen for Firefox license key is illegal and prevent future development of Firefox. Download links are directly from our mirrors or publisher's website, Firefox torrent or shared files from free file sharing and free upload services, including Rapidshare, MegaUpload, YouSendIt, SendSpace, DepositFiles, DivShare, HellShare, HotFile, FileServe or MediaFire, are not used.

Firefox users' reviews

Firefox 45.1 review by Tadhg (Mar 23, 2016)
It is not the browser itself that is awful, it is the CONSTANT stream of Major updates. Release 45? Really? I expect a MAJOR release maybe twice a year, FF has NOT been out for 22 years. Quit churning them out. and 45.1 2 days after 45.0? Really? And forcing you to update whether you want to or not. The last two releases crashed jobs I was running by forcing. That is why I'm going to Chrome, and I have been a FF user since release 2!
Firefox 24.0 review by THEODORA MORALES (Oct 19, 2013)
Firefox 8.0.1 review by Steve Freedman (Nov 27, 2011)
I'm getting duplicate windows opening in the browser. I don't know if this is a bug in Firefox or a virus, worm, etc.

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