• • • Mozilla Firefox (or simply Firefox) is a developed by and its subsidiary,. Firefox is available for, and. Its sibling,, is available for.

Firefox uses the to render web pages, which implements current and anticipated. An additional version,, was released in late 2015; however, because of artificial restrictions imposed by, it is forced to use the platform-bundled layout engine.

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Firefox was created in 2002 under the codename 'Phoenix' by the community members who desired a standalone browser, rather than the bundle. During its phase, Firefox proved to be popular with its testers and was praised for its speed, security, and add-ons compared to 's then-dominant. Firefox was released in November 2004, and challenged 's dominance with 60 million downloads within nine months. Firefox is the of, as the Mozilla community was created by in 1998 before their acquisition. Firefox usage grew to a peak of 32% at the end of 2009, temporarily making version 3.5 the world's most popular browser. Usage then declined in competition with.

As of September 2017, Firefox has between 5.96% and 13.6% of worldwide as a 'desktop' browser, making it the second most popular web browser. Firefox is still the most popular desktop browser in (even most popular overall at 67.37% ) and with 82.6% and 87.17% of the market share, respectively. It is also the most popular desktop browser in many other African as well as Oceanic countries. According to Mozilla, as of December 2014 there were half a billion Firefox users around the world. Main article: The Firefox project began as an experimental branch of the by,, and. They believed the commercial requirements of 's sponsorship and developer-driven compromised the utility of the Mozilla browser.

To combat what they saw as the 's, they created a stand-alone browser, with which they intended to replace the Mozilla Suite. On April 3, 2003, the announced that they planned to change their focus from the Mozilla to Firefox and.

The community-driven was formed and eventually replaced the Mozilla Application Suite in 2005. Phoenix 0.1 screenshot on The Firefox project has undergone several name changes. It was originally titled Phoenix, which carried the implication of the that rose triumphantly from the ashes of its dead predecessor, in this case from the 'ashes' of Netscape Navigator after it had been killed off by Microsoft Internet Explorer in the '. Phoenix was renamed due to trademark issues with; the replacement name, Firebird, provoked an intense response from the database software project.

In response, the Mozilla Foundation stated that the browser would always bear the name Mozilla Firebird to avoid confusion. After further pressure, on February 9, 2004, Mozilla Firebird became Mozilla Firefox. The name Firefox was said to be derived from a nickname of the, which became the mascot for the newly named project. For the abbreviation of Firefox, Mozilla prefers Fx or fx, though it is often abbreviated as FF. The Firefox project went through many versions before the version 1.0 was released on November 9, 2004.

In 2016, Mozilla announced a project known as, which sought to improve Firefox's Gecko engine and other components in order to improve Firefox's performance, modernize its architecture, and transition the browser to a model. These improvements came in the wake of decreasing market share to, as well as concerns that its performance was lapsing in comparison. Despite its improvements, these changes required existing for Firefox to be made incompatible with newer versions, in favor of a new system that is designed to be similar to Chrome and other recent browsers. Firefox 57, which was released in November 2017, 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 1.0. Features [ ]. Main article: Features include,,,,, a,, location-aware browsing (also known as ') based on a service, and an integrated search system, which uses by default in most markets.

Additionally, Firefox provides an environment for web developers in which they can use built-in tools, such as the Error Console or the, or extensions, such as and more recently there has been an integration feature with. Firefox Hello was an implementation of, added in October 2014, 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 is scheduled to be removed in September 2016.

Functions can be added through created. Add-ons are primarily coded using an and known as WebExtensions, which is designed to be similar to the and extension systems. Firefox previously supported add-ons using the and APIs, which allowed them to directly access and manipulate much of the browser's internal functionality. As they are not compatible with its multi-process architecture, XUL add-ons are now 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. Standards [ ]. The result of the test on Firefox 17 Firefox implements many, including (almost full ),,,, 2 (partial), (with extensions), ECMAScript (),,,, and (Animated ) images with. Firefox also implements standards proposals created by the such as client-side storage, and.

These standards are implemented through the Gecko layout engine, and Spidermonkey JavaScript engine. Firefox has passed the standards-compliance test since version 3.0. Mozilla had originally stated that they did not intend for Firefox to pass the test fully because they believed that the SVG fonts part of the test had become outdated and irrelevant, due to being agreed upon as a standard by all major browser makers. Because the SVG font tests were removed from the Acid3 test in September 2011, Firefox 4 and greater scored 100/100. Firefox also implements a from called 'Safe Browsing', used to exchange data related with phishing and malware protection.

Since version 38 on and newer, Firefox supports the playback of video content protected by HTML5 (EME). For security and privacy reasons [ ], EME is implemented within a wrapper of open source code that allows execution of a module by – Adobe Primetime Content Decryption Module (CDM). CDM runs within a ' environment to limit its access to the system, and provide it a randomized device ID to prevent services from for tracking purposes. The DRM module, once it has been downloaded, is enabled and disabled in the same manner as other. Since version 47, 'Google's Widevine CDM on Windows and Mac OS X so streaming services like can switch from to encrypted HTML5 video' is also supported. Firefox downloads and enables the Adobe Primetime and Google Widevine CDMs by default to give users a smooth experience on sites that require DRM.

Each CDM runs in a separate container called a sandbox and you will be notified when a CDM is in use. You can also disable each CDM and opt out of future updates. See also: Firefox allowed for a to manage privileges accorded to code, but that feature has since been deprecated. It limits scripts from accessing data from other websites based on the. It also provides support for to web applications, for authentication purposes.

It uses to protect communications with web servers using strong when using the protocol. The freely available add-on enforces HTTPS, even if a regular HTTP is entered.

Firefox now supports HTTP/2. The Mozilla Foundation offers a 'bug bounty' (US$3,000 to US$7,500 cash reward) to researchers who discover severe security holes in Firefox. Official guidelines for handling security vulnerabilities discourage early so as not to give potential attackers an advantage in creating exploits. Because Firefox generally has fewer publicly known security than Internet Explorer (see ), improved security is often cited as a reason to switch from Internet Explorer to Firefox. Reported that exploit code for known critical security vulnerabilities in Internet Explorer was available for 284 days in 2006. 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 2006 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 – Firefox's vulnerabilities were fixed on average one day after the exploit code was made available, as compared to nine days for Internet Explorer. Symantec later clarified their statement, saying that Firefox still had fewer security vulnerabilities than Internet Explorer, as counted by security researchers.

In 2010 a study of the (NIST), based on data compiled from the (NVD), Firefox was listed as the fifth most vulnerable desktop software, with Internet Explorer as the eighth, and as the first. Has cited security experts saying that, as Firefox becomes more popular, more vulnerabilities will be found, a claim that, president of the Mozilla Foundation, has denied. 'There is this idea that market share alone will make you have more vulnerabilities.

It is not relational at all,' she said. In October 2009, 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. A 3.5 SP1 had silently installed the vulnerable plug-in into Firefox. This vulnerability has since been patched by Microsoft. As of February 11, 2011, Firefox 3.6 had no known unpatched security according to Secunia. Had five unpatched security vulnerabilities, the worst being rated 'Less Critical' by Secunia.

Mozilla claims that all patched vulnerabilities of Mozilla products are publicly listed. On January 28, 2013, Mozilla was recognized as the most trusted internet company for privacy in 2012.

This study was performed by the Ponemon Institute and was a result of a survey from more than 100,000 consumers in the United States. In February 2013, plans were announced for Firefox 22 to disable by default. However, the introduction of the feature was then delayed so Mozilla developers could 'collect and analyze data on the effect of blocking some third-party cookies.' Mozilla also collaborated with 's 'Cookie Clearinghouse' project to develop a and of sites that will be used in the filter. Version 23, released in August 2013, followed the lead of its competitors by blocking, stylesheet, and script resources served from non-HTTPS servers embedded on HTTPS pages by default.

Additionally, could also no longer be disabled through Firefox's preferences, and JavaScript was automatically re-enabled for users who upgraded to 23 or higher with it disabled. The change was made due to its use across the majority of websites, the potential repercussions on non-experienced users who are unaware of its impact, along with the availability of extensions such as, which can disable JavaScript in a more controlled fashion.

The following release added the ability to disable JavaScript through the developer tools for testing purposes. In January 2015, reported that using Firefox when connected to the internet using a VPN can be a serious security issue due to the browser's support for. Beginning with (2016), all extensions must be signed by Mozilla to be used in release and beta versions of Firefox. Firefox 43 blocked unsigned extensions, but allowed enforcement of extension signing to be disabled. All extensions must be submitted to and be subject to code analysis in order to be signed, although extensions do not have to be listed on the service in order to be signed. In Firefox versions prior to 7.0, an appears on the browser's first start asking users whether they would like to send performance statistics, or 'telemetry', to. It is enabled by default in development versions of Firefox, but not in release versions.

According to Mozilla's privacy policy, these statistics are stored only in aggregate format, and the only transmitted is the user's. As of 2016, Firefox is the last widely used browser not to use a browser to isolate content in each tab from each other and from the rest of the system. Version 50 includes a limited sandbox that isolates the content rendering process (separated thanks to the Electrolysis project), which will be progressively enhanced to improve security.

Localizations [ ]. Notes • Firefox 3.5.9 is the last version to work on 11i, as packaged. • In March 2014, the version of Firefox was cancelled, although there is a beta release. • IA-32 support only applies to superscaler processors, SSE2 instruction set support is required for 53.0 and later. Firefox source code may be for various operating systems; however, officially distributed binaries are provided for the following: Required hardware and software Requirement Windows Linux desktop macOS Android iOS or newer with Any CPU and ARM 512 / 2 for the 64-bit version 384 MB? Free space 200 MB 50 MB? Operating system or later or later, and only supported on Firefox 52 ESR Minimum • 3.4 or newer • 2.22 or newer • 1.14 or newer • 4.6.1 or newer • 1.0 or newer Recommended • 0.7 or newer • 1.0 or newer • 2.16 or newer • • 1.7 or newer or newer 4.1 or newer 10.3 or later Microsoft Windows [ ] Firefox 1.0 was released for, as well as and later.

Some users reported the 1.x builds were operable (but not installable) on. Windows 95 support was dropped with version 2.0, as the last build supporting this platform was version 1.5.0.12 in 2007. Version 3.0 dropped support for, and Windows NT 4.0, as the last release supporting these platforms was version 2.0.0.20. The end of support was announced ahead of the version 13.0.

After version 12.0, the mainstream Firefox branch dropped support for Windows 2000. The ESR branch of Firefox, continued support with versions 10.x, the last release of which was version 10.0.12esr in 2013. Version 43.0 included the first builds, made for and. Version 49.0 dropped support for processors without the instruction set on Windows. In 2017, users of Firefox 52.0.2 on, and who had automatic updates enabled, were migrated to Firefox 52 ESR.

Chris Pc Proxy Serial Key on this page. The support is projected to end for these operating systems with the last release in 2018. In September 2013, a version of Firefox optimized for use, was introduced on the 'Aurora' release channel. However, the project has since been cancelled as of March 2014, with Mozilla citing a lack of user adoption of the beta versions.

MacOS [ ] The first official release (Firefox version 1.0) supported (then called Mac OS X) on the architecture. Support for and ended with Firefox version 1.0.8. Mac OS X builds for the architecture became available via a which first debuted with Firefox 1.5.0.2 in 2006. Support for and was dropped with version 3.0. The last supported release was 2.0.0.20. Support for the PowerPC platform and was dropped with version 4.0. The last supported release, version 3.6.28, was in 2012.

Starting with version 4.0, Firefox was released for the x64 architecture to which macOS had migrated. Version 16.0.2 became the last release from the mainstream branch for in 2012. The ESR branch continued the support until Firefox version 10.0.12esr in 2013. Firefox 47.0.2 (mainstream branch) and 45.9.0esr (ESR branch) were the last versions to support, and.

IA-32 builds in the universal binary for newer platforms continue to present. Linux [ ] Since its inception Firefox for Linux supported the 32-bit memory architecture of the IA-32 instruction set. Starting with 53.0. The 32-bit builds require the instruction set. In addition, starting with version 4.0, x64 builds are also available.

Firefox for mobile [ ]. Main articles: and Firefox for, code-named, is a web browser for smaller non-PC devices, mobile phones, and. It was originally first released for the operating system, specifically the Nokia N900, on January 28, 2010. On March 29, 2011, besides Maemo, Version 4 was added for Android. With the release of mobile version, the browser's version number was bumped from 2 to 4, synchronizing it with all future desktop releases of Firefox because the rendering engines used in both browsers are the same.

Version 7 was the last release for Maemo on the N900. The user interface is completely redesigned and optimized for small screens, the controls are hidden away so that only the web content is shown on screen, and it uses interaction methods. It includes the Awesomebar, tabbed browsing, Add-on support, password manager, location-aware browsing, and the ability to synchronize with the user's computer Firefox browser using.

In April 2013, then-Mozilla CEO said that Firefox would not come to iOS as long as Apple required the use of the layout engine to do so. One reason given by Mozilla was that prior to iOS 8, Apple had supplied third-party browsers with an inferior version of their JavaScript engine which hobbled their performance, making it impossible to match Safari's JavaScript performance on the iOS platform. Apple later opened their 'Nitro' JavaScript engine to third-party browsers. In 2015, Mozilla announced it was moving forward with Firefox for iOS, with a preview release made available in in September of that year. In November 2016, Firefox released a new iOS app titled, a private web browser.

Notes • is not listed in this table as its version numbers would be misleading; it uses version numbers that do not correspond to any of the other Firefox versions. Those share a core component, the Gecko rendering engine, and track its version numbers, whereas the version for the operating system uses the operating system's rendering engine (WebKit), rather than Mozilla's (Gecko). Unofficial ports [ ] Firefox has also been ported to,,,, and, and an unofficial rebranded version called has been available for. An unofficial continuation of the macOS release continues as. The Firefox port for OpenBSD is maintained by Landry Breuil since 2010. 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.

In 2017, Landry began hosting packages of newer Firefox versions for OpenBSD releases from 6.0 onwards, making them available to installations without the ports system. Firefox is also ported to and by Oracle Solaris Desktop Beijing Team, unofficial port of.x to and unofficial port of v1.7.x to..9 is the last version to work on 11i, as packaged. • • • Latest stable version Support status 10 and OpenSolaris Old version, no longer supported: 2005–2016 8–9 Old version, no longer supported: 2004–2008 11 Current stable version: and 2016– 10 Current stable version: and 2014– 6.2 Current stable version: and 2017– 6.1 Old version, no longer supported: and 2017 6.0 Old version, no longer supported:,, and 2016–2017 5.9 Old version, no longer supported: and 2016 5.8 Old version, no longer supported:, and 2015–2016 5.7 Old version, no longer supported:,, and 2015.

See also:, and Besides official releases, Mozilla provides development builds of Firefox in distribution channels named, in order of most to least stable, 'Beta', 'Developer Edition' (former 'Aurora', renamed on November 10, 2014 ), and 'Nightly'. As of November 15, 2017, Firefox 58 is in the 'Beta' and 'Developer Edition' channel, and Firefox 59 is in the 'Nightly' channel. Starting from Firefox 54, 'Developer Edition' is based on the 'Beta' build. Firefox Extended Support Release, abbreviated to ESR, 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 approximately one year.

Unlike the regular ('rapid') releases, ESRs are not updated with new features and performance enhancements every six weeks, but rather are updated with only high-risk-reduction or high-impact security fixes or major stability fixes with point releases, until the end of the ESR cycle. Licensing [ ] Firefox is, with most of it being released under the (MPL) version 2.0. This license permits anyone to view, modify, or redistribute the source code. As a result, several publicly released applications have been built from it, such as,,,,,,, and. In the past, Firefox was licensed solely under the MPL, then version 1.1, which the criticized for being, as the license permitted, in limited ways, proprietary.

Additionally, code only licensed under MPL 1.1 could not legally be linked with code under the. To address these concerns, Mozilla re-licensed most of Firefox under the scheme of MPL 1.1, GPL 2.0, or 2.1. 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. However, on January 3, 2012, Mozilla released the GPL-compatible MPL 2.0, and with the release of Firefox 13 on June 5, 2012, Mozilla used it to replace the tri-licensing scheme. The crash reporting service was initially closed-source, but switched with version 3 from a program called to the open-source (and Socorro server).

Trademark and logo [ ]. See also: The name 'Mozilla Firefox' is a; along with the official Firefox logo, it may only be used under certain terms and conditions. Anyone may redistribute the official binaries in unmodified form and use the Firefox name and branding for such distribution, but restrictions are placed on distributions which modify the underlying source code. The name 'Firefox' derives from a nickname of the. Mozilla has placed the Firefox logo files under open-source licenses, but its trademark guidelines do not allow displaying altered or similar logos in contexts where trademark law applies.

Logo used for There has been some controversy over the Mozilla Foundation's intentions in stopping certain open source distributions from using the 'Firefox' trademark. Open source browsers 'enable greater choice and innovation in the market rather than aiming for mass-market domination.' Mozilla Foundation Chairperson explained in an interview in 2007 that distributions could freely use the Firefox trademark if they did not modify source-code, and that the Mozilla Foundation's only concern was with users getting a consistent experience when they used 'Firefox'.

To allow distributions of the code without using the official branding, the Firefox contains a 'branding switch'. This switch, often used for alphas ('Auroras') of future Firefox versions, allows the code to be compiled without the official logo and name, and can allow a derivative work unencumbered by restrictions on the Firefox trademark to be produced. In the unbranded build the trademarked logo and name are replaced with a freely distributable generic globe logo and the name of the release series from which the modified version was derived. Distributing modified versions of Firefox under the 'Firefox' name required explicit approval from Mozilla for the changes made to the underlying code, and required the use of all of the official branding. For example, it was not permissible to use the name 'Firefox' without also using the official logo. When the project decided to stop using the official Firefox logo in 2006 (because Mozilla's copyright restrictions at the time were incompatible with ), they were told by a representative of the Mozilla Foundation that this was not acceptable, and were asked either to comply with the published trademark guidelines or cease using the 'Firefox' name in their distribution. Ultimately, Debian switched to branding their modified version of Firefox ' (but in 2016 switched back to Firefox), along with other Mozilla software.

Is another derived version of Firefox distributed by the, which maintains its own separate branding. Branding and visual identity [ ] Early Firebird and Phoenix releases of Firefox were considered to have reasonable visual designs, but fell short when compared to many other professional software packages. In October 2003, professional interface designer Steven Garrity wrote an article covering everything he considered to be wrong with Mozilla's visual identity. Shortly afterwards, the Mozilla Foundation invited Garrity to head up the new visual identity team. The release of Firefox 0.8 in February 2004 saw the introduction of the new branding efforts. Included were new icon designs by silverorange, a group of web developers with a long-standing relationship with Mozilla. The final renderings are by, who had worked on.

The logo was later revised and updated, fixing several flaws found when it was enlarged. The animal shown in the logo is a stylized fox, although 'firefox' is usually a common name for the. The panda, according to Hicks, 'didn't really conjure up the right imagery' and wasn't widely known. The Firefox icon is a trademark used to designate the official Mozilla build of the Firefox software and builds of official distribution partners. For this reason software distributors who distribute modified versions of Firefox do not use the icon. • Logo history •. Firefox mascot at the 16 (2015) Firefox was adopted rapidly, with 100 million downloads in its first year of availability.

This was followed by a series of aggressive marketing campaigns starting in 2004 with a series of events and called 'marketing weeks'. Firefox continued to heavily market itself by releasing a marketing portal dubbed 'Spread Firefox' (SFX) on September 12, 2004, It debuted along with the Firefox Preview Release, creating a centralized space for the discussion of various marketing techniques. The release of their manifesto stated that “the Mozilla project is a global community of people who believe that openness, innovation and opportunity are key to the continued health of the Internet.” A two-page ad in the edition of December 16 of the New York Times, placed by Mozilla Foundation in coordination with Spread Firefox, featured the names of the thousands of people worldwide who contributed to the Mozilla Foundation's fundraising campaign to support the launch of the Firefox 1.0 web browser. SFX portal enhanced the 'Get Firefox' button program, giving users 'referrer points' as an incentive. The site lists the top 250 referrers. From time to time, the SFX team or SFX members launch marketing events organized at the Spread Firefox website. As a part of the Spread Firefox campaign, there was an attempt to break the world download record with the release of Firefox 3.

This resulted in an official certified, with over eight million downloads. In February 2011, Mozilla announced that it would be retiring Spread Firefox (SFX). Three months later, in May 2011, Mozilla officially closed Spread Firefox. Mozilla wrote that 'there are currently plans to create a new iteration of this website [Spread Firefox] at a later date.' In celebration of the third anniversary of the founding of the, the 'World Firefox Day' campaign was established on July 15, 2006, and ran until September 15, 2006. Participants registered themselves and a friend on the website for nomination to have their names displayed on the Firefox Friends Wall, a digital wall that will be displayed at the headquarters of the Mozilla Foundation.

The Firefox community has also engaged in the promotion of their web browser. In 2006, some of Firefox's contributors from made a of the Firefox logo in an field near, near the intersection of Lafayette Highway and Walnut Hill Road. After Firefox reached 500 million downloads on February 21, 2008, the Firefox community celebrated by visiting to earn 500 million grains of rice. Other initiatives include Live Chat, a service Mozilla launched in 2007 that allowed users to seek technical support from volunteers. The service was later retired.

Performance [ ] In December 2005, Internet Week ran an article in which many readers reported high memory usage in Firefox 1.5. Mozilla developers said that the higher memory use of Firefox 1.5 was at least partially due to the new fast backwards-and-forwards (FastBack) feature. Other known causes of memory problems were malfunctioning extensions such as and some older versions of, or plug-ins, such as older versions of Adobe Acrobat Reader. When PC Magazine in 2006 compared memory usage of Firefox 2,, and, they found that Firefox used approximately as much memory as each of the other two browsers. Noted that Firefox 1.5 took longer to start up than other browsers, which was confirmed by further speed tests. IE 6 launched more swiftly than Firefox 1.5 on Windows XP since many of its components were built into the OS and loaded during system startup.

As a workaround for the issue, a preloader application was created that loaded components of Firefox on startup, similar to Internet Explorer. A Windows Vista feature called performs a similar task of preloading Firefox if it is used often enough. Tests performed by and Zimbra in 2006 indicated that Firefox 2 used less memory than Internet Explorer 7. Firefox 3 used less memory than Internet Explorer 7, Opera 9.50 Beta, 3.1 Beta, and Firefox 2 in tests performed by Mozilla, CyberNet, and The Browser World. In mid-2009, Betanews benchmarked Firefox 3.5 and declared that it performed 'nearly ten times better on XP than Microsoft Internet Explorer 7'. In January 2010, Lifehacker compared the performance of Firefox 3.5, Firefox 3.6, Google Chrome 4 (stable and Dev versions), Safari 4, and Opera (10.1 stable and 10.5 pre-alpha versions).

Lifehacker timed how long browsers took to start and reach a page (both right after boot-up and after running at least once already), timed how long browsers took to load nine tabs at once, tested JavaScript speeds using Mozilla's Dromaeo online suite (which implements Apple's and Google's V8 tests) and measured memory usage using Windows 7's process manager. They concluded that Firefox 3.5 and 3.6 were the fifth and sixth fastest browsers respectively on startup, 3.5 was third and 3.6 was sixth fastest to load nine tabs at once, 3.5 was sixth and 3.6 was fifth fastest on the JavaScript tests. They also concluded that Firefox 3.6 was the most efficient with memory usage followed by Firefox 3.5.

In February 2012, performance tested Chrome 17, Firefox 10,, Opera 11.61, and Safari 5.1.2 on Windows 7. Tom's Hardware summarized their tests into four categories: Performance, Efficiency, Reliability, and Conformance. In the performance category they tested,,,,,,, and ( is current as of version 51; and Java and Silverlight stop working as of version 52) – they also tested start up time and page load time.

The performance tests showed that Firefox was either 'acceptable' or 'strong' in most categories, winning three categories (HTML5, HTML5, and Java) only finishing 'weak' in CSS performance. In the efficiency tests, Tom's Hardware tested memory usage and management. In this category, it determined that Firefox was only 'acceptable' at performing light memory usage, while it was 'strong' at performing heavy memory usage. In the reliability category, Firefox performed a 'strong' amount of proper page loads. In the final category, conformance, it was determined that Firefox had 'strong' conformance for JavaScript and HTML5.

In conclusion, Tom's Hardware determined that Firefox was the best browser for Windows 7 OS, but that it only narrowly beat Google Chrome. In June 2013, Tom's Hardware again performance tested Firefox 22, Chrome 27, Opera 12, and. They found that Firefox slightly edged out the other browsers in their 'performance' index, which examined wait times, JavaScript execution speed, HTML5/CSS3 rendering, and hardware acceleration performance. Firefox also scored the highest on the 'non-performance' index, which measured memory efficiency, reliability, security, and standards conformance, finishing substantially ahead of Chrome, the runner-up. Tom's Hardware concluded by declaring Firefox the 'sound' winner of the performance benchmarks. In January 2014, a benchmark testing the memory usage of Firefox 29, Google Chrome 34, and indicated that Firefox used the least memory when a substantial number of tabs were open. In benchmark testing in early 2015 on a 'high-end' Windows machine, comparing, Internet Explorer, Firefox, Chrome, and Opera, Firefox achieved the highest score on three of the seven tests.

Four different Javascript performance tests gave conflicting results. Firefox bested the others on the, but was behind the Microsoft products when tested with SunSpider. Measured with Mozilla's Kraken, it came second place to Chrome, while on Google's challenge it took third behind Chrome and Opera.

Firefox took the lead with WebXPRT, which runs several typical HTML5 and Javascript tasks. Firefox, Chrome, and Opera all achieved the highest possible score on the Oort Online test, measuring WebGL rendering speed (WebGL 2 is now current).

In terms of HTML5 compatibility testing, Firefox was ranked in the middle of the group. A similar set of benchmark tests in 2016 showed Firefox's Javascript performance on Kraken and the newer tests trailing slightly behind all other tested browsers except Internet Explorer, which performed relatively poorly. On Octane, Firefox came ahead of IE and Safari, but again slightly behind the rest, including and Microsoft Edge.

Edge took overall first place on the Jetstream and Octane benchmarks. Market adoption [ ]. According to, showing the rise and fall of Firefox Downloads have continued at an increasing rate since Firefox 1.0 was released in November 2004, and as of 31 July 2009 Firefox had already been downloaded over one billion times.

This number does not include downloads using software updates or those from third-party websites. They do not represent a user count, as one download may be installed on many machines, one person may download the software multiple times, or the software may be obtained from a third party. According to Mozilla, Firefox has more than 450 million users as of October 2012. In July 2010, asked all employees (about 400,000) to use Firefox as their default browser.

Firefox was the second-most used web browser until November 2011, when Google Chrome surpassed it. As of November 2017, Firefox was the second most widely used 'desktop browser' (and that position makes it the fourth most popular with approximately 6% of worldwide across all platforms ). 7 December 2017. 7 December 2017. Retrieved 2017-11-13. Retrieved 2016-08-10. Retrieved 2017-11-13.

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Firefox for Dummies. External links [ ].

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