Screenshot of Firefox 57 running on Windows 10
|Initial release||September 23, 2002|
|Operating system||Windows, macOS, Linux, Android, iOS (Unofficial ports to BSDs, Solaris, OpenSolaris, illumos)|
|Included with||Firefox OS, Debian, Ubuntu, Linux Mint, Manjaro Linux|
|Engines||Gecko, SpiderMonkey, WebKit (iOS only)|
|Available in||91 languages|
|Type||Web browser, mobile web browser, feed reader|
|Standard(s)||HTML5, CSS3, RSS, Atom|
|Origins and lineage|
Mozilla Firefox (or simply Firefox) is a free and open-source web browser developed by Mozilla Foundation and its subsidiary, Mozilla Corporation. Firefox is available for Windows, macOS and Linux operating systems. Its sibling, Firefox for Android, is available for Android. Firefox uses the Gecko layout engine to render web pages, which implements current and anticipated web standards. An additional version, Firefox for iOS, was released in late 2015; due to platform restrictions, it uses the WebKit layout engine instead of Gecko.
Firefox was created in 2002 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 in November 2004, and challenged Internet Explorer's dominance with 60 million downloads within nine months. Firefox is the spiritual successor of Netscape Navigator, as the Mozilla community was created by Netscape in 1998 before their acquisition by AOL.
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 Google Chrome. As of September 2017[update], Firefox has between 5.96% and 13.6% of worldwide usage as a "desktop" browser, making it the second most popular web browser. Firefox is still the most popular desktop browser in Cuba (even most popular overall at 67.37%), Eritrea, and Germany, with 82.6%, 87.17%, and 35.68% 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[update] there were half a billion Firefox users around the world.
- 1 History
- 2 Features
- 3 Localizations
- 4 Platform availability
- 5 Version history
- 6 Licensing
- 7 Trademark and logo
- 8 Promotion
- 9 Performance
- 10 Market adoption
- 11 See also
- 12 References
- 13 Further reading
- 14 External links
The Firefox project began as an experimental branch of the Mozilla project by Dave Hyatt, Joe Hewitt, and Blake Ross. They believed the commercial requirements of Netscape's sponsorship and developer-driven feature creep compromised the utility of the Mozilla browser. To combat what they saw as the Mozilla Suite's software bloat, they created a stand-alone browser, with which they intended to replace the Mozilla Suite. On April 3, 2003, the Mozilla Organization announced that they planned to change their focus from the Mozilla Suite to Firefox and Thunderbird. The community-driven SeaMonkey was formed and eventually replaced the Mozilla Application Suite in 2005.
The Firefox project has undergone several name changes. It was originally titled Phoenix, which carried the implication of the mythical firebird 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 "First browser war". Phoenix was renamed due to trademark issues with Phoenix Technologies; the replacement name, Firebird, provoked an intense response from the Firebird 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 red panda, 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 Quantum, 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 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 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 include tabbed browsing, spell checking, incremental find, 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. Additionally, Firefox provides an environment for web developers in which they can use built-in tools, such as the Error Console or the DOM Inspector, or extensions, such as Firebug and more recently there has been an integration feature with Pocket. Firefox Hello was an implementation of WebRTC, 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.
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 has passed the Acid2 standards-compliance test since version 3.0. Mozilla had originally stated that they did not intend for Firefox to pass the Acid3 test fully because they believed that the SVG fonts part of the test had become outdated and irrelevant, due to WOFF 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.
Since version 38 on Windows Vista and newer, Firefox supports the playback of video content protected by HTML5 Encrypted Media Extensions (EME). For security and privacy reasons[which?], EME is implemented within a wrapper of open source code that allows execution of a proprietary DRM module by Adobe Systems – Adobe Primetime Content Decryption Module (CDM). 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. Since version 47, "Google's Widevine CDM on Windows and Mac OS X so streaming services like Amazon Video can switch from Silverlight 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— Watch DRM content on Firefox
and that it is "an important step on Mozilla's roadmap to remove NPAPI plugin support. " Upon the introduction of EME support, builds of Firefox on Windows were also introduced that exclude support for EME.
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 disclosure of vulnerabilities so as not to give potential attackers an advantage in creating exploits.
Because Firefox generally has fewer publicly known security vulnerabilities than Internet Explorer (see Comparison of web browsers), improved security is often cited as a reason to switch from Internet Explorer to Firefox. The Washington Post 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 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 – 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 National Institute of Standards and Technology (NIST), based on data compiled from the National Vulnerability Database (NVD), Firefox was listed as the fifth most vulnerable desktop software, with Internet Explorer as the eighth, and Google Chrome as the first.
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. "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 .NET Framework 3.5 SP1 Windows Update 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 vulnerabilities according to Secunia. Internet Explorer 8 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 third-party cookies 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 Stanford University's "Cookie Clearinghouse" project to develop a blacklist and whitelist of sites that will be used in the filter.
Beginning with Firefox 44 (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 Mozilla Add-ons 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.
As of 2016[update], Firefox is the last widely used browser not to use a browser sandbox to isolate Web 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.
Firefox is a widely localized web browser. The first official release in November 2004 was available in 24 different languages and for 28 locales, including British English, American English, European Spanish, Argentine Spanish, and Chinese in Traditional Chinese characters and Simplified Chinese characters. As of December 2017[update], currently supported versions 57.0.2 and 52.5.2esr are available in 89 locales (79 languages).
The desktop version of Firefox is available and supported for Windows, macOS and Linux, while Firefox for Android is available for Android (formerly Firefox for mobile, it also ran on Firefox OS).
Firefox source code may be compiled for various operating systems; however, officially distributed binaries are provided for the following:
|CPU||Pentium 4 or newer with SSE2||Any x64 CPU||ARM and IA-32||ARM|
|Memory (RAM)||512 MB / 2 GB for the 64-bit version||384 MB||?|
|Hard disk drive free space||200 MB||50 MB||?|
|Operating system||7 or later
Server 2008 R2 or later
||OS X 10.9 or newer||4.1 or newer||10.3 or later|
Firefox 1.0 was released with Win32 builds for Windows 95 and NT 4.0 onwards. Some users reported the 1.x builds were operable, but not installable on NT 3.51. Windows 95 support was dropped with the 2.x versions, the final official build supporting this platform was 184.108.40.206 in 2007. The 3.x versions dropped support for Windows 98, ME and NT 4.0, the final release supporting these platforms was 220.127.116.11.
The end of Windows 2000 support was announced ahead of the 13.0 release. 12.0 became the final release for this platform in 2012. Windows 2000 support continued with the 10 (ESR) versions, the final release of this was 10.0.12esr in 2013.
After 52.0.2, Firefox users on Windows XP through Vista and Server 2008 (and similar operating systems), with automatic updates enabled, were migrated to the 52 (ESR) versions, support is expected to end for these platforms with the final release in 2018.
In September 2013, the Windows 8 Touch interface, optimized for touchscreen 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.
The first official release supported all versions of macOS (then called Mac OS X) under the PowerPC architecture. Support for 10.0 and 10.1 ended after 1.0.8. IA-32 builds for Mac became available via a universal binary which first debuted with 18.104.22.168 in 2006. 10.2 and 10.3 support was dropped with the 3.x versions, the last supported release was 22.214.171.124. PowerPC and 10.4 support was dropped with 4.0, 3.6.x support continued until 2012 with 3.6.28.
The 4.0 binary added a 64-bit build which ran on all Macs with x64 processors under all supported platforms. 16.0.2 became the final release for 10.5 in 2012, ESR version support continued until 10.0.12esr in 2013.
To date, the final change is the discontinuation of support for 10.6 through 10.8, in doing so dropping support for Macs with IA-32 processors. IA-32 builds in the universal binary for newer platforms continue to present. The final releases were 47.0.1 and 45.9.0esr.
Linux build support for the IA-32 architecture is constant since 1.0, except for non-SSE2 processor support which was dropped with 53.0. 4.0 added builds for x64 processors. The current releases are 57.0.2 and 52.5.2esr for IA-32, and 57.0.2 and 52.5.2esr for x64.
Firefox for mobile
Firefox for Android, code-named Fennec, is a web browser for smaller non-PC devices, mobile phones, and PDAs. It was originally first released for the Nokia Maemo 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 touchscreen 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 Firefox Sync.
|Operating system||ISA||Latest stable version||End of support|
|Android||ARMv8-A||Current stable version: 57.0.1 (5.0 and later)||N/A|
|ARMv7||Current stable version: 57.0.1 (4.1 and later)||N/A|
|IA-32||Current stable version: 57.0.1 (5.0 and later)||N/A|
|ARMv6||Old version, no longer supported: 31.3.0esr (2.2–4.3)||2015|
|Firefox OS||ARMv7||Old version, no longer supported: 35/36/37 (2.2)||2015|
|Maemo||Old version, no longer supported: 7.0||2011|
- Firefox for iOS 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 iOS operating system uses the operating system's rendering engine (WebKit), rather than Mozilla's (Gecko).
Firefox has also been ported to FreeBSD, NetBSD, OpenBSD, OpenIndiana, OS/2 and SkyOS, and an unofficial rebranded version called Timberwolf has been available for AmigaOS 4. An unofficial continuation of the macOS PowerPC release continues as TenFourFox.
Firefox is also ported to Solaris and OpenSolaris by Oracle Solaris Desktop Beijing Team, unofficial port of Firefox 3.6.x to IBM AIX and unofficial port of v1.7.x to UnixWare.
|Operating system||ISA||Latest stable version||End of support|
|Solaris||IA-32 and SPARC V9||Old version, no longer supported: 45.5.1esr (10 and OpenSolaris)||2016|
|Old version, no longer supported: 126.96.36.199 (8–9)||2008|
|FreeBSD||x64||Current stable version: 57.0.2 and 52.5.2esr (11) and 57.0.2 and 52.5.2esr (10)||N/A|
|IA-32||Current stable version: 57.0.2 and 52.5.2esr (11) and 57.0.2 and 52.5.2esr (10)||N/A|
|OpenBSD||x64||Current stable version: 57.0.2 and 52.5.2esr (6.2)||N/A|
|IA-32||Current stable version: 57.0.2 and 52.5.2esr (6.2)||N/A|
|PPC||Old version, no longer supported: 39.0.3 and 38.1.1esr (5.8)||2016|
|SPARC V9||Old version, no longer supported: 31.4.0esr (5.7)||2015|
|Alpha||Old version, no longer supported: 3.6.25 (5.1)||2012|
Firefox 30 on OS X Mavericks
Firefox 42.0 on OS X El Capitan
Firefox 57 on macOS High Sierra
Firefox on Firefox OS
Firefox on MeeGo OS
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[update], 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.
Firefox source code is free software, with most of it being released under the Mozilla Public License (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 Netscape, Flock, Miro, GNU IceCat, Iceweasel, Songbird, Pale Moon, and Comodo IceDragon.
In the past, Firefox was licensed solely under the MPL, then version 1.1, which the Free Software Foundation criticized for being weak copyleft, as the license permitted, in limited ways, proprietary derivative works. Additionally, code only licensed under MPL 1.1 could not legally be linked with code under the GPL. To address these concerns, Mozilla re-licensed most of Firefox under the tri-license scheme of MPL 1.1, GPL 2.0, or LGPL 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.
Trademark and logo
The name "Mozilla Firefox" is a registered trademark; 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 red panda.
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.
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 Mitchell Baker 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 build system 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 Debian project decided to stop using the official Firefox logo in 2006 (because Mozilla's copyright restrictions at the time were incompatible with Debian's guidelines), 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 "Iceweasel" (but in 2016 switched back to Firefox), along with other Mozilla software. GNU IceCat is another derived version of Firefox distributed by the GNU Project, 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 Jon Hicks, who had worked on Camino. 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 red panda. 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.
Firefox 23 – 56, from August 6, 2013 to September 28, 2017
The 2011 Aurora logo, used to represent an alpha release
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 Blake Ross and Asa Dotzler 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 Guinness world record, 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 Mozilla Foundation, 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 Oregon State University made a crop circle of the Firefox logo in an oat field near Amity, Oregon, 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 Freerice to earn 500 million grains of rice.
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 Google Toolbar and some older versions of AdBlock, or plug-ins, such as older versions of Adobe Acrobat Reader. When PC Magazine in 2006 compared memory usage of Firefox 2, Opera 9, and Internet Explorer 7, they found that Firefox used approximately as much memory as each of the other two browsers.
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 SuperFetch performs a similar task of preloading Firefox if it is used often enough.
Tests performed by PC World 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, Safari 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 2014, a benchmark testing the memory usage of Firefox 29, Google Chrome 34, and Internet Explorer 11 indicated that Firefox used the least memory when a substantial number of tabs were open.
Downloads have continued at an increasing rate since Firefox 1.0 was released in November 2004, and as of 31 July 2009[update] 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[update].
Firefox was the second-most used web browser until December 2011, when Google Chrome surpassed it.
As of November 2017[update], Firefox was the second most widely used "desktop browser" (and that position makes it the fourth most popular with approximately 6% of worldwide usage share of web browsers across all platforms).
- "Firefox — Notes (57.0.2) — Mozilla". mozilla.org. Mozilla Foundation. 7 December 2017.
- "Firefox Extended Support Release — Notes (52.5.2) — Mozilla". mozilla.org. Mozilla Foundation. 7 December 2017.
- "Firefox — Beta Notes (58.0beta) — Mozilla". 2017-11-08. Retrieved 2017-11-13.
- "Mozilla Firefox Web Browser — Download Firefox Beta in your language — Mozilla". Retrieved 2016-08-10.
- "Firefox - Notes (59.0a1) — Mozilla". 2017-11-13. Retrieved 2017-11-13.
- "Mozilla Firefox Web Browser — Download Firefox Nightly in your language — Mozilla". Retrieved 2017-11-13.
- Yegulalp, Serdar (February 3, 2017). "Mozilla binds Firefox's fate to the Rust language". InfoWorld. Retrieved August 19, 2017.
- "Supported Devices". Retrieved August 8, 2015.
- "Latest Firefox Windows installer". Mozilla. Retrieved December 5, 2015.
- "Latest Firefox Windows 64-bit installer". Mozilla. Retrieved December 5, 2015.
- "Latest Firefox OS X installer". Mozilla. Retrieved December 5, 2015.
- "Latest Firefox Linux installer". Mozilla. December 31, 2015. Retrieved December 31, 2015.
- "Latest Firefox Linux 64-bit installer". Mozilla. December 31, 2015. Retrieved December 31, 2015.
- "Firefox 57.0.1 (arm) (Android 4.1+)". APKMirror. Illogical Robot. Retrieved 5 December 2017.
- "Firefox 57.0.1 (arm64) (Android 5.0+)". APKMirror. Illogical Robot. Retrieved 5 December 2017.
- "Firefox 57.0.1 (x86) (Android 4.1+)". APKMirror. Illogical Robot. Retrieved 5 December 2017.
- "Firefox Web Browser on the App Store". App Store. Apple. Retrieved 2017-10-01.
- "Mozilla Firefox release files". Mozilla.
- "Mozilla". Mozilla. Retrieved October 20, 2014.
- Mozilla Licensing Policies, mozilla.org, retrieved January 5, 2012
- "Debian and Mozilla – a study in trademarks". LWN.net. Retrieved September 14, 2011.
- "Gecko Layout Engine". download-firefox.org. July 17, 2008. Archived from the original on June 15, 2010. Retrieved May 10, 2012.
- "Firefox browser takes on Microsoft". BBC News Online. BBC. 9 November 2004.
- "The assault on software giant Microsoft". BBC News Online. BBC. 9 May 2005.
- Jay, Paul (August 6, 2010). "Curtains for Netscape – Tech Bytes". CBC News.
- StatCounter. "StatCounter Global Stats – Browser, OS, Search Engine including Mobile Usage Share". gs.statcounter.com. Retrieved September 16, 2016.
- Eaton, Nick (21 December 2009). "Firefox 3.5 is world's most popular browser, StatCounter says". SeattlePi. Hearst Seattle Media.
- "StatCounter global stats – Top 12 browser versions". StatCounter. Retrieved March 12, 2010.
- "Desktop Browser Market Share Worldwide: Apr 2016 - Sept 2017". StatCounter Global Stats. StatCounter. Retrieved October 10, 2017.
- "Web Browser Market Share Trends". W3Counter. Awio Web Services LLC. Retrieved August 7, 2015.
- "Desktop Browser Market Share". Net Applications. Retrieved August 7, 2015.
- "Web browsers (Global marketshare)". Clicky. Roxr Software Ltd. Retrieved August 7, 2015.
- "Browser market share in Cuba: Sept 2017". statcounter.com. Retrieved October 10, 2017.
- "Desktop Browser Market Share in Cuba: Sept 2017". statcounter.com. Retrieved October 10, 2017.
- "Desktop Browser Market Share in Eritrea: Sept 2017". statcounter.com. Retrieved October 10, 2017.
- "Desktop Browser Market Share in Germany: Sept 2017". statcounter.com. Retrieved October 10, 2017.
- "Desktop market share in Africa". statcounter.com. Retrieved September 4, 2017.
- "Desktop market share in Oceania". statcounter.com. Retrieved September 4, 2017.
- "At a Glance |Mozilla Press Center". Mozilla. Retrieved December 7, 2014.
- Goodger, Ben (February 6, 2006). "Where Did Firefox Come From?". Inside Firefox. MozillaZine Weblogs. Archived from the original on June 23, 2011. Retrieved January 7, 2012.
- Yeow, Cheah Chu (2005). Firefox Secrets. SitePoint Pty Ltd. ISBN 978-0975240243. Retrieved February 25, 2014.
- Eich, Brendan; David Hyatt (April 2, 2003). "mozilla development roadmap". Mozilla. Retrieved August 2, 2009.
- "Mozilla browser becomes Firebird". IBPhoenix. Archived from the original on September 14, 2007. Retrieved January 30, 2007.
- Festa, Paul (May 6, 2003). "Mozilla's Firebird gets wings clipped". CNET. Retrieved January 30, 2007.
- Festa, Paul (February 9, 2004). "Mozilla holds 'fire' in naming fight". CNET News. Retrieved January 24, 2007.
- "Firefox name FAQ". Mozilla. Archived from the original on February 28, 2012. Retrieved March 13, 2012.
- "Red panda". BBC Nature. Retrieved August 20, 2014.
- "Firefox 1.5 Release Notes". Mozilla. November 29, 2005. Retrieved November 17, 2014.
- "Inside Mozilla: Firefox fights back". 2017-08-04. Retrieved 2017-10-09.
- Dignan, Larry (2017-08-06). "Why you should root for Mozilla's Firefox 57 in the browser wars". ZDNet. Retrieved 2017-10-09.
- Keizer, Gregg. "Mozilla seeks return to glory with release of Firefox Quantum". Computerworld. Retrieved 2017-12-11.
- "Location-Aware Browsing". Mozilla Foundation. Retrieved July 5, 2009. (section "What information is being sent, and to whom? (...)")
- Lardinois, Frederic. "Mozilla terminates its deal with Yahoo and makes Google the default in Firefox again". TechCrunch. Retrieved 14 November 2017.
- "Hang up the phone: Mozilla to pull the plug on Firefox Hello in September". August 5, 2016.
- "Upcoming Changes in Compatibility Features". Mozilla Add-ons Blog. Retrieved 2017-12-11.
- "Mozilla sets plan to dump Firefox add-ons, move to Chrome-like extensions". Ars Technica. Retrieved 2017-12-11.
- "Mozilla sets plan to dump Firefox add-ons, move to Chrome-like extensions". Ars Technica. Retrieved August 22, 2015.
- "Social & Communication: Add-ons for Firefox". addons.mozilla.org. Retrieved November 16, 2015.
- "SVG 2 support in Mozilla".
- "SVG in Firefox". Retrieved September 30, 2007.
- "CSS Reference: Mozilla Extensions – MDC". Developer.mozilla.org. April 24, 2011. Retrieved August 17, 2011.
- Mozilla Developer Center contributors (January 21, 2007). "Which open standards is the Gecko development project working to support, and to what extent does it support them?". Gecko FAQ. Mozilla Developer Network. Retrieved January 24, 2007.
- "WHATWG specification – Web Applications 1.0 – Working Draft. Client-side session and persistent storage". Web Hypertext Application Technology Working Group. February 7, 2007. Retrieved February 7, 2007.
- Mozilla Developer Center contributors (September 30, 2007). "DOM:Storage". Mozilla Developer Network. Retrieved February 7, 2007.
- Dumbill, Edd (December 6, 2005). "The future of HTML, Part 1: WHATWG". IBM. Retrieved January 24, 2007.
- Fulton, Scott (December 20, 2007). "Latest Firefox beta passes Acid2 test, IE8 claims to pass also". Betanews. Retrieved December 21, 2007.
- "Why Firefox 4 Will Never Pass The Acid3 Test". Archived from the original on February 3, 2011. Retrieved February 1, 2011.
- "Ian Hickson announces Acid3 modifications". September 17, 2011. Retrieved September 17, 2011.
- Acid3 Test Simplified, Tom's Hardware
- "Phishing and Malware Protection". Mozilla Corp. How does Phishing and Malware Protection work in Firefox?. Retrieved November 29, 2009.
- "Client specification for the Google Safe Browsing v2.1 protocol". Google Inc. Retrieved November 29, 2009.
Do not use this protocol without explicit written permission from Google. Note: This is not a license to use the defined protocol. [...]
- "Firefox — Notes (47.0)".
- "Watch DRM content on Firefox – Firefox Help".
- "Mozilla To Test Widevine CDM in Firefox Nightly".
- Jeremy Kirk (May 15, 2014). "Mozilla hates it, but streaming video DRM is coming to Firefox". PC World.
- "Firefox 38 arrives with contentious closed-source DRM integrated by default". PC World. Retrieved August 12, 2015.
- Ranganathan, Arun; Netscape Communications (November 11, 2002). "Bypassing Security Restrictions and Signing Code". Mozilla Developer Network. Retrieved January 24, 2007.
- "The Same Origin Policy". Mozilla Developer Network. June 8, 2001. Retrieved November 12, 2007.
- Developer documentation on using PKCS 11 modules (primarily smart cards) for cryptographic purposes
- "Privacy & Security Preferences – SSL". Mozilla. August 31, 2001. Retrieved January 24, 2007.
- "Why You Should Use Firefox: 7 Reasons", eCloudBuzz, March 15, 2015.
- "Mozilla Security Bug Bounty Program". Mozilla. Retrieved July 20, 2016.
- "Handling Mozilla Security Bugs". Mozilla. February 11, 2003. Retrieved January 24, 2007.
- Mossberg, Walter S. (September 16, 2004). "How to Protect Yourself From Vandals, Viruses If You Use Windows". The Wall Street Journal. Archived from the original on February 21, 2007. Retrieved October 17, 2006.
I suggest dumping Microsoft's Internet Explorer Web browser, which has a history of security breaches. I recommend instead Mozilla Firefox, which is free at mozilla.org. It's not only more secure but also more modern and advanced, with tabbed browsing, which allows multiple pages to be open on one screen, and a better pop-up ad blocker than the belated one Microsoft recently added to IE.
- Granneman, Scott (June 17, 2004). "Time to Dump Internet Explorer". SecurityFocus. Retrieved January 24, 2007.
- Costa, Dan (March 24, 2005). Vamosi, Scott, ed. "Mozilla Firefox Browser [sic] review". CNET. CBS Interactive. Archived from the original on 26 December 2007.
- Boutin, Paul (June 30, 2004). "Are the Browser Wars Back?". Slate. Retrieved January 24, 2007.
- Krebs, Brian (January 4, 2007). "Internet Explorer Unsafe for 284 Days in 2006". The Washington Post. Archived from the original on January 17, 2010. Retrieved January 24, 2007.
- Keizer, Gregg (September 25, 2006). "Firefox Sports More Bugs, But IE Takes 9 Times Longer To Patch". TechWeb. Archived from the original on February 7, 2008. Retrieved January 24, 2007.
- McMillan, Robert (March 7, 2006). "Symantec adjusts browser bug count". InfoWorld. Retrieved January 24, 2007.
- "Web Browsers, Desktop Software Top "Dirty Dozen" Apps List". Securityweek.com. Retrieved January 2, 2013.
- Francis, Bob. "Security firms fight Firefox fire with fire". InfoWorld.
- Kanellos, Michael (March 23, 2005). "Popularity won't make Firefox insecure, says Mozilla head". silicon.com. Archived from the original on May 21, 2011. Retrieved October 13, 2006.
- "Sneaky Microsoft plug-in puts Firefox users at risk (Internet – Software – Security)". Retrieved December 19, 2009.
- "Microsoft Security Bulletin MS09-054 – Critical". Microsoft. Retrieved March 17, 2010.
- "Vulnerability Report: Mozilla Firefox 3.6.x". Secunia. Retrieved February 11, 2011.
- "Vulnerability Report: Microsoft Internet Explorer 8.x". Secunia. Retrieved February 11, 2011.
- "Known Vulnerabilities in Mozilla Products". Mozilla.
- https://blog.mozilla.org/blog/2013/01/28/privacy-day-2013/ Mozilla Recognized as Most Trusted Internet Company for Privacy
- "Firefox 23 Release Notes". Mozilla.org. Retrieved March 14, 2014.
- "Firefox 23 lands with a new logo and mixed content blocking". Ars Technica. August 2013. Retrieved March 14, 2014.
- Huge Security Flaw Leaks VPN Users' Real IP-addresses TorrentFreak.com (January 30, 2015). Retrieved February 21, 2015.
- "Addons/Extension Signing". Mozilla wiki. Retrieved September 24, 2015.
- Villalobos, Jorge. "Introducing Extension Signing: A Safer Add-on Experience". Mozilla Add-ons Blog. Retrieved August 31, 2015.
- "FAQ – Why is Telemetry enabled by default on the Firefox pre-release channels?". MozillaWiki. Mozilla.
- "Firefox takes the next step toward rolling out multi-process to everyone". Ars Technica. Retrieved December 25, 2016.
- "Firefox/AddOns/Status/current - MozillaWiki". wiki.mozilla.org.
- "Index of /pub/firefox/releases/1.0/win32/". Retrieved August 22, 2011.
- "Mozilla Firefox System Requirements". mozilla.org. Mozilla Foundation. November 29, 2017.
- "Will Firefox work on my mobile device?". Mozlla Support. Mozilla.
- "Supported build configurations – MDN". Retrieved August 12, 2015.
- "Firefox — 53.0 System Requirements". Mozilla.
- "Firefox — 52.0 System Requirements". Mozilla.
- "Firefox — Aurora Notes (45.0a2)". Mozilla.org. Mozilla Foundation. December 18, 2015. Retrieved February 29, 2016.
- Tilley, Chris url=www.c-amie.co.uk/technical/nt351-firefox/. "Mozilla Firefox and Windows NT 3.51".
- Keybl, Alex. "Upcoming Firefox Support Changes". Firefox Future Releases Blog. Retrieved December 10, 2017.
- Mayo, Mark. Firefox Future Releases Blog https://blog.mozilla.org/futurereleases/2015/12/15/firefox-64-bit-for-windows-available/. Retrieved December 14, 2017. Missing or empty
- Firefox Future Releases Blog https://blog.mozilla.org/futurereleases/2016/12/23/firefox-support-for-xp-and-vista/. Retrieved December 14, 2017. Missing or empty
- Nightingale, Johnathan. "Update on Metro". Firefox Future Releases Blog. Retrieved March 14, 2014.
- "Mozilla Firefox Web Browser – Supported Android Devices". Mozilla. Retrieved July 20, 2013.
- "Firefox for Windows 8 enters Aurora channel with touch and gesture support". Engadget. Retrieved September 21, 2013.
- "Mozilla Firefox 4 System Requirements". mozilla.org. Mozilla Foundation. Retrieved March 24, 2011.
- "Mozilla Firefox 3.6 System Requirements". techappsmedia. July 10, 2016.
- "Mozilla Developer Preview Alpha 5 Release Notes". Mozilla. 2010-06-14. Archived from the original on June 29, 2011. Retrieved 2011-07-10.
- Protalinski, Emil (April 29, 2016). "Mozilla will retire Firefox support for OS X 10.6, 10.7, and 10.8 in August 2016". VentureBeat.
- "Firefox - 45.9.0 System Requirements". mozilla.org. Mozilla Foundation. April 19, 2017.
- "Firefox for Nokia N900 Release Notes". Mozilla. January 28, 2010. Retrieved January 30, 2010.
- "Mozilla Launches Firefox 4 for Android, Allowing Users to Take the Power and Customization of Firefox Everywhere". Mozilla Blog. Mozilla. March 29, 2011. Retrieved March 29, 2011.
- "Fennec 4.0 – New and Notable". Stark Raving Finkle. September 2010.
- "Bug 681422: No updates in Maemo5 (Comment #1)". Mozilla Bugzilla. Mozilla.
- "Firefox mobile features". Mozilla. Retrieved January 30, 2010.
- "Mozilla wants to bring Firefox to iOS, but mean ol' Apple's standing in its way". VentureBeat. Retrieved September 18, 2016.
- "iOS 8 grants new power to rival browsers, Web-based apps". Retrieved September 18, 2016.
- "Firefox for iOS Now Available for Preview". September 3, 2015. Retrieved September 7, 2015.
- Gavin Clarke (September 4, 2015). "Fruity Firefox: Mozilla caves to Apple, unveils iOS-friendly browser". Retrieved September 7, 2015.
- "Update on Firefox for iOS". May 22, 2015. Retrieved September 7, 2015.
- "Mozilla launches Firefox Focus, a private web browser for iPhone". TechCrunch. Retrieved May 6, 2017.
- "Mobile/Platforms/Android". wiki.mozilla.org. Mozilla Foundation. September 28, 2017. System Requirements.
- "FreeBSD port of Firefox". Retrieved September 30, 2014.
- NetBSD binary package of Firefox 24
- "OpenBSD port of Firefox".
- Source package of Firefox 3.6.15 Archived March 4, 2016, at the Wayback Machine.. pkgsrc-repo.uk.openindiana.org.
- "[hobbes.nmsu.edu] Viewing file: /pub/os2/apps/internet/www/browser/firefox-38.8.0.en-us.os2-wpi.wpi". hobbes.nmsu.edu. Retrieved October 18, 2016.
- "Directory Listing: /pub/firefox/releases/38.2.1esr/contrib/". Ftp.mozilla.org. Retrieved October 29, 2015.
- "Mozilla – Firefox, Thunderbird & Sunbird". UNIX Packages. Retrieved October 29, 2015.
- "IBM AIX: Web browsers for AIX". 03.ibm.com. Archived from the original on January 5, 2016. Retrieved October 29, 2015.
- "Mozilla on AIX FAQ". Archive.mozilla.org. Retrieved October 29, 2015.
- "README Mozilla, v. 1.7.13 for SCO(R) UnixWare(R) 7.1.3 SCO(R) UnixWare(R) 7.1.4". Ftp.sco.com. June 6, 2005. Retrieved October 29, 2015.
- "Firefox/Thunderbird Web Browsers for HP-UX 11i" (Requires HP Passport Sign-in). Hewlett-Packard. Retrieved August 14, 2011.
- "Firefox – Aurora Notes (35.0a2) – Mozilla". November 10, 2014. Retrieved November 21, 2014.
Version 35.0a2, first offered to Firefox Developer Edition users in November 2014
- "Bug 1072181 – Investigate tweaking aurora for developers". Retrieved November 21, 2014.
- "Firefox Channels". Mozilla.
- "Simplifying Firefox Release Channels and Improving Developer Edition's Stability". Mozilla.
- "Firefox Extended Release Support for Your Organization, Business, Enterprise – Overview". Mozilla.org. Retrieved March 17, 2012.
- Paul, Ryan (January 10, 2012). "Firefox extended support will mitigate rapid release challenges". Arstechnica.com. Retrieved April 4, 2012.
- "Mozilla Relicensing FAQ". Mozilla. Archived from the original on May 13, 2010. Retrieved January 24, 2007.
- Stallman, Richard. "On the Netscape Public License". Free Software Foundation. Retrieved January 24, 2007.
- "Various Licenses and Comments about Them. Mozilla Public License (MPL)". Free Software Foundation. Retrieved January 24, 2007.
- "Announcing Version 2.0 of the Mozilla Public License". Mozilla. January 3, 2012. Archived from the original on March 6, 2012. Retrieved June 6, 2012.
- "Firefox 13 released – now using SPDY by default". The H – Open. Retrieved June 6, 2012.
- "Mozilla Trademark Policy". Mozilla. Retrieved January 30, 2007.
- "LICENSE file for official branding directory".
- "Mozilla bug 541761 – Some text implies the Firefox logo is under a non-free copyright license".
- "Legal Stuff". Mozilla Corp. Retrieved March 7, 2009.[dead link]
- "Stop Logo Cruelty". Mozilla Corp. Archived from the original on May 22, 2010. Retrieved March 7, 2009. "Don't Create new elements that look enough like the Firefox logo so as to cause confusion."
- Krishnamurthy, Sandeep (August 1, 2009). "CASE: Mozilla vs. Godzilla — The Launch of the Mozilla Firefox Browser". Journal of Interactive Marketing. 23 (3): 259–271. doi:10.1016/j.intmar.2009.04.008.
- Warne, Dan (May 7, 2007). "The stoush over Linux distributions using the Firefox trademark". APC Magazine. ACP Magazines Ltd. Retrieved January 18, 2008.
- "Debian Bug report logs – #354622: Uses Mozilla Firefox trademark without permission". Debian. Retrieved January 30, 2007.
- "Re: ice weasel". September 23, 2007.
- Garrity, Steven (October 23, 2003). "Branding Mozilla: Towards Mozilla 2.0". Retrieved February 8, 2009.
- Garrity, Steven (February 9, 2004). "Branding Mozilla: Towards Firefox 1.0". Retrieved February 8, 2009.
- Hicks, Jon (February 8, 2004). "Branding Firefox". Hicksdesign. Retrieved February 8, 2009.
- Hicks, Jon (December 16, 2004). "Spot the Difference". Hicksdesign. Retrieved February 8, 2009.
- Mozilla Trademark Policy for Distribution Partners Version 0.9 (DRAFT). Retrieved November 2, 2006.
- Martell, Sean (June 27, 2013). "(Re)building a simplified Firefox logo". Reticulating Splines. Retrieved September 5, 2013.
- Mozilla Trademark Policy FAQ "What are the Mozilla Trademarks and Logos?". Retrieved November 2, 2006
- Palmer, Judi; Colvig, Mary (October 19, 2005). "Firefox surpasses 100 million downloads". Mozilla. Retrieved February 4, 2007.
- Ross, Blake (July 7, 2004). "Week 1: Press reviews". Blake Ross. Archived from the original on August 5, 2004. Retrieved February 4, 2007.
- "We're igniting the web. Join us!". Spread Firefox: Sfx Team's Blog. September 12, 2004. Archived from the original on January 25, 2007. Retrieved February 4, 2007.
- "Mozilla Foundation Places Two-Page Advocacy Ad in the New York Times" (PDF). Mozilla Foundation. December 15, 2004. Retrieved June 15, 2010.
- "Set a Guinness World Record Enjoy a Better Web". Mozilla Blog. Mozilla Foundation. May 2008. Archived from the original on January 12, 2011. Retrieved May 30, 2008.
- Keizer, Gregg. "Firefox 4 sets unofficial download record". Computerworld. Retrieved August 21, 2012.
- Snyder, Ryan (February 25, 2011). "Spread Firefox". Mozilla Blog. Archived from the original on June 1, 2012. Retrieved May 15, 2012.
- Sfx Team (July 16, 2006). "World Firefox Day Launches". Spread Firefox: Sfx Team's Blog. Archived from the original on December 10, 2006. Retrieved January 24, 2007.
- "Mozilla Foundation Announcement". Mozilla. July 15, 2003.
- "Friends of Firefox Frequently Asked Questions". Archived from the original on November 16, 2007. Retrieved November 27, 2007.
- "Take Back the Field". Oregon State Linux Users Group. August 14, 2006. Retrieved August 28, 2011.
- "500 million Firefox downloads: complete; 500 million grains: in progress". Mozilla Blog. Mozilla. February 21, 2008. Retrieved June 24, 2009.
- "Firefox Support Blog " Blog Archive " Firefox Live Chat launching today". The Mozilla Blog. December 28, 2007. Retrieved August 6, 2009.
- Brinkmann, Martin (January 2, 2008). "Firefox Live Chat Support". gHacks Technology News. Retrieved May 2, 2014.
- Finnie, Scot (December 8, 2005). "Firefox 1.5: Not Ready For Prime Time?". InformationWeek. Archived from the original on June 24, 2009. Retrieved January 24, 2007.
- Goodger, Ben (February 14, 2006). "About the Firefox 'memory leak'". MozllaZine weblogs. Archived from the original on July 17, 2011. Retrieved November 17, 2007.
- MozillaZine Knowledge Base contributors (January 19, 2007). "Problematic Extensions". MozillaZine Knowledge Base. Retrieved January 24, 2007.
- MozillaZine Knowledge Base contributors (January 17, 2007). "Adobe Reader". MozillaZine Knowledge Base. Retrieved January 24, 2007.
- Muchmore, Michael W. (July 19, 2006). "Which New Browser Is Best: Firefox 2, Internet Explorer 7, or Opera 9?". PC Magazine. Retrieved January 24, 2007.
- Muradin, Alex (November 30, 2005). "Mozilla Firefox 1.5 Final Review". Softpedia. Retrieved September 22, 2006.
- Wilton-Jones, Mark. "Browser Speed Comparisons". How To Create. Retrieved January 24, 2007.
- "Firefox Preloader". SourceForge. Retrieved April 26, 2007.
- Larkin, Erik (October 24, 2006). "Radically New IE 7 or Updated Mozilla Firefox 2 – Which Browser Is Better?". PC World. Retrieved May 18, 2007.
- Dargahi, Ross (October 19, 2006). "IE 7 vs IE 6". Zimbra. Retrieved January 24, 2007.
- Paul, Ryan (March 17, 2008). "Firefox 3 goes on a diet, eats less memory than IE and Opera". Ars Technica. Retrieved June 1, 2008.
- "Browser Performance Comparisons". CyberNet News. March 26, 2008. Retrieved June 1, 2008.
- "Firefox 3.0 Beta 4 Vs Opera 9.50 Beta Vs Safari 3.1 Beta: Multiple Sites Opening Test". The Browser World. March 29, 2008. Archived from the original on June 16, 2008. Retrieved June 1, 2008.
- Scott M. Fulton, III (July 1, 2009). "The final score: Firefox 3.5 performs at 251% the speed of 3.0". Betanews. Retrieved May 4, 2010.
- "Browser Speed Tests: Firefox 3.6, Chrome 4, Opera 10.5, and Extensions". Lifehacker. January 26, 2010. Retrieved May 4, 2010.
- Overa, Adam (February 21, 2012). "Benchmark Analysis: Windows 7 and Ubuntu 11.10". Tom's Hardware. Retrieved April 8, 2012.
- Overa, Adam (June 30, 2013). "Chrome 27, Firefox 22, IE10, And Opera Next, Benchmarked". Tom's Hardware. Retrieved May 2, 2014.
- Brinkmann, Martin (January 2, 2014). "Chrome 34, Firefox 29, Internet Explorer 11: Memory Use 2014". gHacks Technology News. Retrieved May 2, 2014.
- "Spartan Benchmarks: Spartan vs. IE, Chrome, Firefox & Opera". TekRevue. April 1, 2015. Retrieved January 10, 2016.
- "Battle of the best browsers: Edge vs. Chrome vs. Firefox vs. Safari vs. Opera vs. IE". Digital Trends. Retrieved January 10, 2016.
- Shankland, Stephen (July 31, 2009). "Firefox: 1 billion downloads only part of the story". CNET News. Retrieved December 19, 2009.
- "Spread Firefox: Mozilla Firefox Download Counts". Mozilla. Archived from the original on July 17, 2005. Retrieved February 14, 2007.
- Siegler, MG (November 18, 2010). "Mozilla: $104 Million In Revenues, 400 Million Users, Google Deal Running Through 2011". Retrieved June 8, 2011.
- "IBM names Firefox its default browser". Bob Sutor. July 1, 2010. Retrieved November 21, 2013.
- Efrati, Amir (December 2, 2011). "Google's Chrome Surpasses Firefox as No.2 browser to Internet Explorer". The Wall Street Journal. Retrieved April 1, 2012.
- StatCounter. Retrieved November 1, 2017.
- "Top 5 Desktop browser on November 2017". StatCounter.
- Cheah, Chu Yeow (2005). Firefox Secrets: A Need-To-Know Guide. O'Reilly. ISBN 0-9752402-4-2.
- Feldt, Kenneth C. (2007). Programming Firefox. O'Reilly. ISBN 0-596-10243-7.
- Granneman, Scott (2005). Don't Click on the Blue e!: Switching to Firefox. O'Reilly. ISBN 0-596-00939-9.
- Hofmann, Chris; Marcia Knous; John Hedtke (2005). Firefox and Thunderbird Garage. Prentice Hall PTR. ISBN 0-13-187004-1.
- McFarlane, Nigel (2005). Firefox Hacks. O'Reilly. ISBN 0-596-00928-3.
- Reyes, Mel (2005). Hacking Firefox: More Than 150 Hacks, Mods, and Customizations. Wiley. ISBN 0-7645-9650-0.
- Ross, Blake (2006). Firefox for Dummies. Wiley. ISBN 0-471-74899-4.