Screenshot of Firefox 49 running on Windows 10
Mozilla Foundation and contributors|
|Initial release||September 23, 2002|
|Stable release(s) [±]|
|Preview release(s) [±]|
|Operating system||Windows, macOS, Linux, Android, iOS,(Unofficial ports to BSDs, Solaris, OpenSolaris, illumos)|
|Included with||Firefox OS, FreeBSD|
|Engines||Gecko, SpiderMonkey, WebKit (iOS only)|
|Available in||79 languages|
Mobile web browser
|Standard(s)||HTML5, CSS3, RSS, Atom|
|Origins and lineage|
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 is available for Windows, macOS and Linux operating systems, with its Firefox for Android available for Android (formerly Firefox for mobile, it also ran on the discontinued Firefox OS); where all of these versions use 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, but this version doesn't use Gecko due to Apple's restrictions limiting third-party web browsers to the WebKit-based layout engine built into iOS.
Firefox was created in 2002, under the name "Phoenix" by the Mozilla community members who wanted a standalone browser rather than the Mozilla Application Suite bundle. Even 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 was highly successful with 60 million downloads within nine months, which was the first time that Internet Explorer's dominance was challenged. Firefox is considered 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 January 2016, Firefox has between 9% and 16% of worldwide usage as a "desktop" browser, making it the second most popular web browser. Firefox is still the most popular browser in Cuba, Eritrea, and Germany, with 85.93%, 79.39%, and 38.36%, of the market share, respectively. It is also the most popular desktop browser in many other African countries. According to Mozilla, as of December 2014 there were half a billion Firefox users around the world. With Internet Explorer declining, Firefox reached second place in February 2016 as a desktop browser.
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.
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 that uses Yahoo! Search, which is a front end of Microsoft search engine Bing, by default in most localizations. 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, so users can experience Firefox in a more personal way. There are websites where users can create and download personalized themes, with their choice of colors and images. This can make the experience of using Firefox more fun compared to other web browsers that do not offer custom-built themes. However, Mozilla has announced its intention to discontinue Firefox themes. The Firefox add-on website also gives users the ability to add other applications such as games, ad-blockers, screenshot apps, and many other useful 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, 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
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.
Firefox uses a sandbox security model, and limits scripts from accessing data from other websites based on the same-origin policy. It also provides support for smart cards to web applications, for authentication purposes. It uses SSL/TLS to protect communications with web servers using strong cryptography when using the HTTPS protocol. The freely available HTTPS Everywhere add-on enforces HTTPS, even if a regular HTTP URL is entered. Firefox now supports HTTP/2.
The Mozilla Foundation offers a "bug bounty" (US$3000 to US$7500 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 had to 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 would be submitted to Mozilla Add-ons and be subject to code analysis in order to be signed, although extensions would not have to be listed on the service in order to be signed.
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 November 2016, currently supported 50.0.2 and 45.5.1esr 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). 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, citing a lack of user adoption of the beta versions.
OS support history
|Operating system||Latest stable version||Support status|
|Windows||7 and later||50.0.2 (IA-32), 50.0.2 (x64), 45.5.1esr (IA-32) and 45.5.1esr (x64)||2009—|
|XP, Server 2003 SP1 and Vista||50.0.2 (IA-32) and 45.5.1esr (IA-32)||2004–2018|
|2000, XP (RTM, SP1) and Server 2003 RTM||10.0.12esr and 12.0||2004–2013|
|NT 4, 98, 98 SE and ME||188.8.131.52||2004–2008|
|macOS||10.9–10.12||50.0.2 and 45.5.1esr||2013—|
|10.6–10.8||45.5.1esr; and 47.0.1 was supported||2009–2017|
|10.5 (Intel)||10.0.12esr and 16.0.2||2007–2013|
|Linux||Desktop||50.0.2 (i686), 50.0.2 (x86_64), 45.5.1esr (i686) and 45.5.1esr (x86_64)||2004—|
|Android 4.0 and newer||50.0.2||2011—|
|Android 2.2||31.0 and 31.3.0esr||2011–2014|
|Firefox OS 2.2||35/36/37||2015|
|Firefox OS 2.0||31/32.0||2013–2015|
- 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, as those share a core component, the Gecko rendering engine and track its version numbers while the version for the iOS operating system uses the operating system's rendering engine (WebKit), rather than Mozilla's Gecko).
- Green color denotes current Firefox versions, while the red colour is for older versions.
- In March 2014, the Windows Store app version of Firefox was cancelled, although there is a beta release.
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 on Unix
Mozilla made Firefox for 64-bit Linux a priority with the release of Firefox 4, labeling it as tier 1 priority. Since being labeled tier 1, Mozilla has been providing official 64-bit releases for its browser for Linux. Vendor-backed 64-bit support has existed for Linux distributions such as Novell-Suse Linux, Red Hat Enterprise Linux, and Ubuntu prior to Mozilla's support of 64-bit, even though vendors were faced with the challenge of having to turn off the 64-bit JIT compiler due to its instability prior to Firefox 4.
The official releases of Firefox for macOS are universal builds that include both 32-bit and 64-bit versions of the browser in one package, and have been this way since Firefox 4. A typical browsing session uses a combination of the 64-bit browser process and a 32-bit plugin process, because some popular plugins still are 32-bit.
The 32-bit and 64-bit versions of Windows can be used to run 32-bit Firefox. In late 2012, Mozilla announced 64-bit Windows builds would be stopped but later reversed the decision. As of April 2015, 64-bit Windows builds are available as 38.0 Beta and newer. 64-bit builds for Windows are officially supported as of November 2015 with the release of Firefox 42. All NPAPI plugins except Adobe Flash Player and Silverlight are blacklisted and unsupported on 64-bit versions for Windows.
Other CPU architectures
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 Intel CPU|| ARMv7 CPU
(ARMv6 was also supported)
|Memory (RAM)||512 MB||384 MB||?|
|Hard disk drive free space||200 MB||50 MB||?|
|Operating system version|| XP SP2 (desktop)
Server 2003 SP1 (server)
||OS X 10.9 or newer||4.0 or newer||iOS 8.2 or later|
Firefox for Android
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.
Firefox for iOS
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 25, 2016, Firefox 51 is in the "Beta" channel, Firefox 52 is in the "Developer Edition" channel, and Firefox 53 is in the "Nightly" channel.
Extended Support Release
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.
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.
Logo used for Firefox 1.0 – 3.0 from November 9, 2004 to June 29, 2009
Logo used for Firefox 3.5 – 22.0 from June 30, 2009 to August 5, 2013
Logo used for Firefox 23 and after since August 6, 2013
- Martell, Sean (June 27, 2013). "(Re)building a simplified Firefox logo". Reticulating Splines. Retrieved September 5, 2013.
Logo of "Phoenix" and "Firebird" before being renamed as Firefox
The 2011 Aurora logo, used to represent an alpha release
The 2013 Aurora logo
The 2013 Nightly logo
Firefox Developer Edition logo
Minefield logo (former name for "nightly" Firefox)
- Mozilla Trademark Policy FAQ "What are the Mozilla Trademarks and Logos?". Retrieved November 2, 2006
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 December 16th edition 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 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.
Softpedia 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 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 July 31, 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, IBM asked all employees (about 400,000) to use Firefox as their default browser.
As of February 2016, Firefox was the second most widely used "desktop browser" (and that position makes it the third most popular with approximately 10% of worldwide usage share of web browsers across all platforms).
- "Firefox — Notes (50.0.2) — Mozilla". mozilla.org. 2016-11-30. Retrieved 2016-11-30.
- "Firefox Extended Support Release — Notes (45.5.1) — Mozilla". mozilla.org. 2016-11-30. Retrieved 2016-11-30.
- "Firefox — Beta Notes (50.0beta) — Mozilla". 2016-10-16. Retrieved 2016-10-23.
- "Mozilla Firefox Web Browser — Download Firefox Beta in your language — Mozilla". Retrieved 2016-07-02.
- "Firefox — Aurora Notes (52.0a2) — Mozilla". 2016-11-18. Retrieved 2016-11-18.
- "Mozilla Firefox Web Browser — Download Developer Edition in your language — Mozilla". Retrieved 2016-11-18.
- "RapidRelease/Calendar - MozillaWiki". Retrieved 2016-10-21.
- "Mozilla Firefox Web Browser — Download Firefox Nightly in your language — Mozilla". Retrieved 2016-10-23.
- "Languages summary". ohloh.net.
- Klabnik, Steve (February 29, 2016). "Is it true that Mozilla wants to rewrite Firefox in Rust language for security reasons?". Quora.
- "Firefox uses an "html.css" stylesheet for default rendering styles". David Walsh. Retrieved December 19, 2009.
- "Supported Devices". Retrieved 2015-08-08.
- "Latest Firefox Windows installer". Mozilla. December 31, 2015. Retrieved December 31, 2015.
- "History of FireFox distribution size". Linexp.ru. March 23, 2013. Archived from the original on May 15, 2013. Retrieved July 1, 2013.
- "Latest Firefox OS X installer". Mozilla. December 31, 2015. Retrieved December 31, 2015.
- "Latest Firefox Linux installer". Mozilla. December 31, 2015. Retrieved December 31, 2015.
- "Firefox for Android on Google Play". Retrieved November 19, 2012.
- "Latest stable Firefox release". Mozilla. June 20, 2016.
- "Mozilla Firefox release files". Mozilla. Retrieved July 9, 2013.
- "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 November 28, 2010. Retrieved May 10, 2012.
- "Firefox browser takes on Microsoft". BBC.
- "Business – The assault on software giant Microsoft". BBC.
- Jay, Paul (August 6, 2010). "Curtains for Netscape – Tech Bytes". Canadian Broadcasting Corporation.
- "Other / Spiritual Successor". TV Tropes.
- StatCounter. "StatCounter Global Stats - Browser, OS, Search Engine including Mobile Usage Share". gs.statcounter.com. Retrieved 2016-09-16.
- Firefox 3.5 is world's most popular browser, StatCounter says, Nick Eaton. seattlepi blogs. 2009-12-21. Retrieved 2009-12-22.
- "StatCounter global stats – Top 12 browser versions". StatCounter. Retrieved 12 March 2010.
- "Top 5 Desktop Browsers from Aug 2012 to Feb 2016". StatCounter Global Stats. StatCounter. Retrieved February 16, 2016.
- "StatCounter Global Stats - Browser, OS, Search Engine including Mobile Usage Share". statcounter.com. Retrieved February 29, 2016.
- "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.
- "StatCounter Global Stats - Browser, OS, Search Engine including Mobile Usage Share". statcounter.com. Retrieved February 29, 2016.
- "StatCounter Global Stats - Browser, OS, Search Engine including Mobile Usage Share". statcounter.com. Retrieved February 29, 2016.
- "Top 9 Browsers in Germany from Jan 2015 to Feb 2016". StatCounter Global Stats. StatCounter. Retrieved February 16, 2016.
- "At a Glance |Mozilla Press Center". Mozilla. Retrieved December 7, 2014.
- "StatCounter Global Stats - Browser, OS, Search Engine including Mobile Usage Share". statcounter.com. Retrieved August 21, 2016.
- 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. 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.
- "Location-Aware Browsing". Mozilla Foundation. Retrieved July 5, 2009. (section "What information is being sent, and to whom? (...)")
- "Yahoo Will Soon Become The Default Search Engine in Firefox". TechCrunch. AOL Inc. Retrieved August 27, 2015.
- "Hang up the phone: Mozilla to pull the plug on Firefox Hello in September". August 5, 2016.
Much of the specifics of the new API are similar to the Blink extension API.
- "Mozilla sets plan to dump Firefox add-ons, move to Chrome-like extensions". Ars Technica. Retrieved August 22, 2015.
- Gupta, Ankit (2015-11-08). "Mozilla to discontinue Firefox themes". TWCN. Retrieved 2016-07-20.
- "Social & Communication: Add-ons for Firefox". addons.mozilla.org. Retrieved 2015-11-16.
- "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". 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; Scott Vamosi (March 24, 2005). "CNET editors' review". CNET Reviews. Retrieved January 24, 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.
- "Index of /pub/firefox/releases/1.0/win32/". Retrieved August 22, 2011.
- 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 System Requirements". Mozilla. November 15, 2016. Retrieved November 15, 2016.
- Martin Brinkmann (September 27, 2016). "Firefox 53: no support for Windows XP or Vista". Ghacks. Retrieved September 27, 2016.
- "End of Firefox Support for Windows 2000". October 9, 2012. Retrieved October 10, 2012.
- Emil Protalinski (April 29, 2016). "Mozilla will retire Firefox support for OS X 10.6, 10.7, and 10.8 in August 2016". VentureBeat. Retrieved July 12, 2016.
- Mozilla. "Mozilla Firefox 16 System Requirements". Mozilla. Retrieved November 20, 2012.
- Mozilla. "Mozilla Firefox 4 System Requirements". Mozilla. Retrieved March 24, 2011.
- muralimude (July 10, 2016). "Mozilla Firefox 3.6 System Requirements". techappsmedia. Retrieved July 12, 2016.
- "Will Firefox work on my mobile device?". Retrieved 2016-03-22.
- "Firefox for Android — Notes (47.0) — Mozilla". mozilla.org. 2016-06-07. Retrieved 2016-07-07.
- Mozilla. "Mozilla Firefox for Mobile 32 Release Notes". Mozilla. Retrieved October 15, 2014.
- Johnathan Nightingale (March 14, 2014). "Update on Metro". Retrieved March 15, 2014.
- "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. 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 2016-10-18.
- "Directory Listing: /pub/firefox/releases/38.2.1esr/contrib/". Ftp.mozilla.org. Retrieved 2015-10-29.
- "Mozilla - Firefox, Thunderbird & Sunbird". UNIX Packages. Retrieved 2015-10-29.
- "IBM AIX: Web browsers for AIX". 03.ibm.com. Retrieved 2015-10-29.
- "Mozilla on AIX FAQ". Archive.mozilla.org. Retrieved 2015-10-29.
- "README Mozilla, v. 1.7.13 for SCO(R) UnixWare(R) 7.1.3 SCO(R) UnixWare(R) 7.1.4". Ftp.sco.com. 2005-06-06. Retrieved 2015-10-29.
- "Firefox/Thunderbird Web Browsers for HP-UX 11i" (Requires HP Passport Sign-in). Hewlett-Packard. Retrieved August 14, 2011.
- "Mozilla Firefox Web Browser". Mozilla. Retrieved December 16, 2015.
- "Supported build configurations". Mozilla Developer Network. Mozilla. March 4, 2013. Retrieved December 10, 2013.
- "Proposed changes to supported build configurations (tiers)". Retrieved July 14, 2012.
- "Mozilla FTP directory for 64-bit Linux builds of Firefox 4". Mozilla. Retrieved July 14, 2012.
- "Expose x86_64 Linux builds on the download pages". Bugzilla. Mozilla. Retrieved July 14, 2012.
- "FTP directory for Mozilla Firefox 13.0.1 nightly build candidates". Mozilla. Archived from the original on June 19, 2012.
- "10.04 firefox 3.6 JIT not active on x86_64". Retrieved July 14, 2012.
- Zbarsky, Boris. "Re: Requirements for being called Firefox 4". mozilla.dev.planning. Google Groups. Retrieved July 14, 2012.
- Aas, Josh (November 10, 2010). "Firefox 4 for Mac OS X: Under the Hood". Boom Swagger Boom. Self-published. Retrieved January 10, 2013.
- "Bug 814009 – Disable windows 64 builds for now". bugzilla.mozilla.org. November 21, 2012. Retrieved October 9, 2013.
- "Mozilla backpedals on Firefox 64-bit for Windows, will keep nightly builds coming after all". December 22, 2012. Retrieved May 23, 2013.
- "Download Firefox Beta in your language". Mozilla. Retrieved April 8, 2015.
- "Use the Java plugin to view interactive content on websites". Mozilla. Retrieved November 4, 2015.
- "Supported build configurations – MDN". Retrieved August 12, 2015.
- "Will Firefox work on my mobile device?". Mozlla Support. Mozilla.
- Mielczarek, Ted (February 17, 2012). "Firefox Mobile on ARMv6 processors". Mozilla.org blog. Mozilla.
ARMv7 contains lots of features that allow programs to run very quickly
- "Firefox — Aurora Notes (45.0a2)". Mozilla.org. Mozilla Foundation. December 18, 2015. Retrieved February 29, 2016.
- "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 2016-09-18.
- "iOS 8 grants new power to rival browsers, Web-based apps". Retrieved 2016-09-18.
- "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.
- "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.
- "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. 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. 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.
- "Stop Logo Cruelty". Mozilla Corp. Archived from the original on May 24, 2010. Retrieved March 7, 2009. "Don't Create new elements that look enough like the Firefox logo so as to cause confusion."
- Krishnamurthy, Sandeep (2009-08-01). "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.
- 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 February 26, 2005. 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. Retrieved May 15, 2012.
- Sfx Team (July 16, 2006). "World Firefox Day Launches". Spread Firefox: Sfx Team's Blog. Archived from the original on August 3, 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. 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 2016-01-10.
- "Battle of the best browsers: Edge vs. Chrome vs. Firefox vs. Safari vs. Opera vs. IE". Digital Trends. Retrieved 2016-01-10.
- 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. 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 April 1, 2016.
- 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.
- Official website for end-users
- Firefox Nightly Builds
- Firefox ESR Builds
- Mozilla Foundation homepage
- Firefox Friends
- Firefox at DMOZ