Get Firefox, a free web browser backed by Mozilla, a non-profit dedicated to internet health and privacy. Available now on Windows, Mac, Linux, Android and iOS. Get the Firefox browser built just for developers. MDN Web Docs. Check out the home for web developer resources. Firefox Reality. Explore the web with the Firefox browser for virtual reality. Common Voice. Donate your voice so the future of the web can hear everyone. WebAssembly. Learn more about the new, low-level, assembly-like language.
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Mozilla Firefox is nothing but a Web Bowser, with which one can access the internet. The web browser lets one access information in form of text, audio, images, and videos from all around the world. Mozilla Firefox was developed by Mozilla Foundation in under the Phoenix community. Jan 06, · Firefox is the short name for Mozilla Firefox and is a web browser. Mozilla is the company that makes the Firefox web browser. The word Mozilla was also used to refer to the Mozilla suite until Mozilla discontinued development (at version back in ) and the SeaMonkey community took over the suite since. Apr 19, · Mozilla Hubs. Gather in this interactive, online, multi-dimensional social space. Firefox Developer Edition. Get the Firefox browser built just for developers. MDN Web Docs. Check out the home for web developer resources. Firefox Reality. Explore the web with the Firefox browser for virtual reality. Common Voice.
Firefox Browser , also known as Mozilla Firefox or simply Firefox , is a free and open-source  web browser developed 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. However, the iOS version uses the WebKit layout engine instead of Gecko due to platform requirements, as with all other iOS web browsers.
Firefox was created in under the codename "Phoenix" by the Mozilla community members who desired a standalone browser, rather than the Mozilla Application Suite bundle. During its beta phase, Firefox proved to be popular with its testers and was praised for its speed, security, and add-ons compared to Microsoft 's then-dominant Internet Explorer 6. Firefox was released on November 9, ,  and challenged Internet Explorer 's dominance with 60 million downloads within nine months.
Firefox usage grew to a peak of They believed the commercial requirements of Netscape 's sponsorship and developer-driven feature creep compromised the utility of the Mozilla browser.
The Firefox project has undergone several name changes. Phoenix was renamed due to a trademark claim from Phoenix Technologies. The replacement name, Firebird, provoked an intense response from the Firebird database software project.
The Firefox project went through many versions before version 1. Version 1. From version 5 onwards, the development and release model changed into a "rapid" one; by the end of the stable release was version 9, and by the end of it reached version In , Mozilla announced a project known as Quantum , which sought to improve Firefox's Gecko engine and other components to improve Firefox's performance, modernize its architecture, and transition the browser to a multi-process model.
These improvements came in the wake of decreasing market share to Google Chrome , as well as concerns that its performance was lapsing in comparison. Despite its improvements, these changes required existing add-ons for Firefox to be made incompatible with newer versions, in favor of a new extension system that is designed to be similar to Chrome and other recent browsers.
Firefox 57, which was released in November , was the first version to contain enhancements from Quantum, and has thus been named Firefox Quantum. A Mozilla executive stated that Quantum was the "biggest update" to the browser since version 1.
On May 3, , the expiration of an intermediate signing certificate caused Firefox to automatically disable and lock all browser extensions add-ons. Features include tabbed browsing , spell checking , incremental search , live bookmarking , Smart Bookmarks , a download manager , private browsing , location-aware browsing also known as " geolocation " based on a Google service,  and an integrated search system, which uses Google by default in most markets.
Firefox Hello was an implementation of WebRTC , added in October , which allows users of Firefox and other compatible systems to have a video call, with the extra feature of screen and file sharing by sending a link to each other. Firefox Hello was scheduled to be removed in September Functions can be added through add-ons created by third-party developers. As compatibility was not included in the multi-process architecture, XUL add-ons have been deemed Legacy add-ons and are no longer supported on Firefox 57 and newer.
Firefox can have themes added to it, which users can create or download from third parties to change the appearance of the browser. The Firefox add-on website also gives users the ability to add other applications such as games, ad-blockers, screenshot apps, and many other apps.
Firefox for Android was equipped with a guest session feature, introduced in , which, when initiated, would memorize ordinary browsing data such as tabs, cookies, and history, but for the duration of the guest session.
The guest session data would be kept even when restarting the browser or device, while deleted only upon a manual exit. The feature was removed, for which Mozilla claims to " streamline the experience ". Firefox has passed the Acid2 standards-compliance test since version 3.
Firefox also implements "Safe Browsing,"  a proprietary protocol  from Google used to exchange data related with phishing and malware protection. For security and privacy reasons, [ which? CDM runs within a " sandbox " environment to limit its access to the system and provide it a randomized device ID to prevent services from uniquely identifying the device for tracking purposes.
The DRM module, once it has been downloaded, is enabled, and disabled in the same manner as other plug-ins. Mozilla justified its partnership with Adobe and Google by stating:. You can also disable each CDM and opt-out of future updates.
In comparison, exploit code for known, critical security vulnerabilities in Firefox was available for nine days before Mozilla issued a patch to remedy the problem. A Symantec study showed that, although Firefox had surpassed other browsers in the number of vendor-confirmed vulnerabilities that year through September, these vulnerabilities were patched far more quickly than those found in other browsers, with Firefox's vulnerabilities being fixed on average one day after the exploit code was made available, as compared to nine days for Internet Explorer.
InfoWorld has cited security experts saying that, as Firefox becomes more popular, more vulnerabilities will be found,  a claim that Mitchell Baker , president of the Mozilla Foundation, has denied.
It is not relational at all," she said. In October , Microsoft's security engineers acknowledged that Firefox was vulnerable to a security issue found in the 'Windows Presentation Foundation' browser plug-in since February of that year. NET Framework 3. As of February 11, [update] , Firefox 3. On January 28, , Mozilla was recognized as the most trusted internet company for privacy in In February , plans were announced for Firefox 22 to disable third-party cookies by default.
A Firefox update on May 3 led to bug reports about all extensions being disabled. This was found to be the result of an overlooked certificate and not the policy change set to go into effect on June In Firefox versions prior to 7. It is enabled by default in development versions of Firefox, but not in release versions.
In November , Firefox began using a sandbox to isolate web tabs from each other and from the rest of the system. Its lack of such a feature had previously earned it negative comparisons with Google Chrome and Microsoft Edge. To use this feature the user must set certain preferences beginning with "network. By setting network. On May 21, , Firefox was updated to include the ability to block scripts that used a computer's CPU to mine cryptocurrency without a user's permission, in Firefox version The update also allowed users to block known fingerprinting scripts that track their activity across the web, however it does not resist fingerprinting on its own.
In Mozilla Foundation Security Advisory —03, the company reported that the CVE - vulnerability type confusion vulnerability in IonMonkey had been detected in the wild and was being actively exploited.
In March , Firefox launched SmartBlock in version 87 to offer protection against cross-site tracking , without breaking the websites users visit. Firefox is a widely localized web browser. The first official release in November was available in 24 different languages and for 28 locales , including British English , American English , European Spanish , Argentine Spanish , Chinese in Traditional Chinese characters and Simplified Chinese characters and in Bengali script.
Firefox source code may be compiled for various operating systems; however, officially distributed binaries are provided for the following:.
Firefox 1. Some users reported the 1. In September , a Metro-style version of Firefox optimized for touchscreen use was introduced on the "Aurora" release channel. However, the project has since been canceled as of March [update] , with Mozilla citing a lack of user adoption of the beta versions. Version In April , users of Firefox Support for these operating systems ended in June The first official release Firefox version 1. Starting with version 4.
Firefox was originally released for Mac OS X Since its inception, Firefox for Linux supported the bit memory architecture of the IA instruction set. Firefox for mobile is a web browser for mobile phones, tablets, and PDAs. It was originally first released for the Nokia Maemo operating system, specifically the Nokia N, on January 28, The former Firefox for Android codenamed Fennec , was a web browser for Android devices, such as mobile phones and tablets.
Its user interface was optimized for small screens and tablets. It included the Awesome Bar, tabbed browsing, add-on support, a password manager, location-aware browsing, and the ability to synchronize with the user's other devices with Firefox Browser using Firefox Sync.
In August , Mozilla launched a new version of its Firefox for Android app, named Firefox Daylight to the public  and codenamed Fenix ,  after a little over a year of testing. It also added Enhanced Tracking Protection 2. Firefox is regularly built for the current branch of the operating system, the latest versions are packaged for each release and remain frozen until the next release. Firefox for Android 62 on Android. Besides official releases, Mozilla provides development builds of Firefox in distribution channels named, in order of most to least stable, "Beta", "Developer Edition" formerly "Aurora", renamed on November 10,   , and "Nightly".
Firefox ESR Extended Support Release is a version of Firefox for organizations and other groups that need extended support for mass deployments. Each ESR release, based on the regular version released at the same time, is supported for one year.
In the past, Firefox was licensed solely under the MPL, then version 1. Additionally, code only licensed under MPL 1. Since the re-licensing, developers were free to choose the license under which they received most of the code, to suit their intended use: GPL or LGPL linking and derivative works when one of those licenses is chosen, or MPL use including the possibility of proprietary derivative works if they chose the MPL.
The crash reporting service was initially closed-source but switched with version 3 from a program called Talkback to the open-source Breakpad and Socorro server. The name "Mozilla Firefox" is a registered trademark ; along with the official Firefox logo, it may only be used under certain terms and conditions.