Firefox Explained

Firefox
Firefox
Developer:Mozilla Foundation and its contributors
Mozilla Corporation
Ver Layout:stacked
Programming Language:C++, JavaScript, HTML, C, Rust, and others[1] [2]
Operating System:Linux
macOS 10.15 or later
Windows 10 or later
Android 5.0 or later[3]
iOS 15.0 or later
Included With:Various Unix-like operating systems
Engines:Gecko, Quantum, and SpiderMonkey; WebKit on iOS
Language Count:97
Genre:Web browser
License:MPL 2.0[4]

Mozilla Firefox, or simply Firefox, is a free and open source[5] web browser developed by the Mozilla Foundation and its subsidiary, the Mozilla Corporation. It uses the Gecko rendering engine to display web pages, which implements current and anticipated web standards.[6] Firefox is available for Windows 10 and later versions of Windows, macOS, and Linux. Its unofficial ports are available for various Unix and Unix-like operating systems, including FreeBSD,[7] OpenBSD,[8] NetBSD,[9] and other platforms. It is also available for Android and iOS. However, as with all other iOS web browsers, the iOS version uses the WebKit layout engine instead of Gecko due to platform requirements. An optimized version is also available on the Amazon Fire TV as one of the two main browsers available with Amazon's Silk Browser.[10]

Firefox is the spiritual successor of Netscape Navigator, as the Mozilla community was created by Netscape in 1998, before its acquisition by AOL.[11] Firefox was created in 2002 under the codename "Phoenix" by members of the Mozilla community who desired a standalone browser rather than the Mozilla Application Suite bundle. During its beta phase, it 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. It was released on November 9, 2004,[12] and challenged Internet Explorer's dominance with 60 million downloads within nine months.[13] In November 2017, Firefox began incorporating new technology under the code name "Quantum" to promote parallelism and a more intuitive user interface.[14]

Firefox usage share grew to a peak of 32.21% in November 2009,[15] with Firefox 3.5 overtaking Internet Explorer 7, although not all versions of Internet Explorer as a whole;[16] [17] its usage then declined in competition with Google Chrome., according to StatCounter, it had a 6.5% usage share on traditional PCs (i.e. as a desktop browser), making it the fourth-most popular PC web browser after Google Chrome (65%), Microsoft Edge (13%), and Safari (9.0%).[18] [19]

History

See also: Firefox early version history and Firefox version history. The 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.[20] To combat what they saw as the Mozilla Suite's software bloat, they created a standalone browser, with which they intended to replace the Mozilla Suite.[21] Version 0.1 was released on September 23, 2002.[22] On April 3, 2003, the Mozilla Organization announced that it planned to change its focus from the Mozilla Suite to Firefox and Thunderbird.[23]

The Firefox project has undergone several name changes.[24] The nascent browser was originally named Phoenix, after the mythical bird that rose triumphantly from the ashes of its dead predecessor (in this case, from the "ashes" of Netscape Navigator, after it was sidelined by Microsoft Internet Explorer in the "First Browser War"). Phoenix was renamed in 2003 due to a trademark claim from Phoenix Technologies. The replacement name, Firebird, provoked an intense response from the Firebird database software project.[25] [26] The Mozilla Foundation reassured them that the browser would always bear the name Mozilla Firebird to avoid confusion. After further pressure, Mozilla Firebird became Mozilla Firefox on February 9, 2004.[27] The name Firefox was said to be derived from a nickname of the red panda,[28] which became the mascot for the newly named project.[29] For the abbreviation of Firefox, Mozilla prefers Fx or fx, although it is often abbreviated as FF.[30]

The Firefox project went through many versions before version 1.0 and had already gained a great deal of acclaim from numerous media outlets, such as Forbes[31] and The Wall Street Journal.[32] Among Firefox's popular features were the integrated pop-up blocker, tabbed browsing, and an extension mechanism for adding functionality. Although these features have already been available for some time in other browsers such as the Mozilla Suite and Opera, Firefox was the first of these browsers to have achieved large-scale adoption. Firefox attracted attention as an alternative to Internet Explorer, which had come under fire for its alleged poor program design and insecurity—detractors cite IE's lack of support for certain Web standards, use of the potentially dangerous ActiveX component, and vulnerability to spyware and malware installation. Microsoft responded by releasing Windows XP Service Pack 2, which added several important security features to Internet Explorer 6.[33]

Version 1.0 of Firefox was released on November 9, 2004.[34] This was followed by version 1.5 in November 2005, version 2.0 in October 2006, version 3.0 in June 2008, version 3.5 in June 2009, version 3.6 in January 2010, and version 4.0 in March 2011. From version 5 onwards, the development and release model changed into a "rapid" one; by the end of 2011 the stable release was version 9, and by the end of 2012 it reached version 17.[35]

Major redesigns of its graphical user interface occurred on versions 4.0 (Strata) in March 2011, 29.0 (Australis) in April 2014, 57.0 (Photon) in November 2017, and 89.0 (Proton) in June 2021.

In 2016, Mozilla announced a project known as Quantum, which sought to improve Firefox's Gecko engine and other components to improve the browser'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.[36] [37] [38] Unresponsive and crashing pages only affect other pages loaded within the same process. While Chrome uses separate processes for each loaded tab, Firefox distributes tabs over four processes by default (since Quantum), in order to balance memory consumption and performance. The process count can be adjusted, where more processes increase performance at the cost of memory, therefore suitable for computers with larger RAM capacity.[39] [40]

On May 3, 2019, the expiration of an intermediate signing certificate on Mozilla servers caused Firefox to automatically disable and lock all browser extensions (add-ons).[41] [42] Mozilla began the roll-out of a fix shortly thereafter, using their Mozilla Studies component.

Support for Adobe Flash was dropped on January 6, 2021, with the release of Firefox 85.[43]

On June 1, 2021, Firefox's 'Proton' redesign was offered through its stable release channel[44] after being made available in the beta builds.[45] While users were initially allowed to revert to the old design through about:config, the corresponding key-value pairs reportedly stopped working in future builds, resulting in criticism.[46] These included accessibility concerns[47] [48] despite Mozilla's claim to "continue to work with the accessibility community"[49] and are continuing issues.[50]

On January 13, 2022, an issue with Firefox's HTTP/3 implementation resulted in a widespread outage for multiple hours.[51]

On September 26, 2023, Firefox 118.0 introduced on-device translation of web page content.[52]

On January 23, 2024, along with the release of Firefox 122.0, Mozilla introduced an official APT repository for Debian-based Linux distributions.[53]

Features

See main article: Features of Firefox. Features of the desktop edition include tabbed browsing, full-screen mode, spell checking, incremental search, smart bookmarks, bookmarking and downloading through drag and drop,[54] [55] a download manager, user profile management,[56] private browsing, bookmark tags, bookmark exporting,[57] offline mode,[58] a screenshot tool, web development tools, a "page info" feature which shows a list of page metadata and multimedia items,[59] a configuration menu at about:config for power users, and location-aware browsing (also known as "geolocation") based on a Google service.[60] Firefox has an integrated search system which uses Google by default in most markets.[61] [62] DNS over HTTPS is another feature whose default behaviour is determined geographically.[63]

Firefox provides an environment for web developers in which they can use built-in tools, such as the Error Console or the DOM Inspector, and 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 was scheduled to be removed in September 2016.[64]

Former features include a File Transfer Protocol (FTP) client for browsing file servers, the ability to block images from individual domains (until version 72),[65] a 3D page inspector (versions 11 to 46), tab grouping (until version 44), and the ability to add customized extra toolbars (until version 28).[66] [67] [68]

Browser extensions

Functions can be added through add-ons created by third-party developers. Add-ons are primarily coded using an HTML, CSS, JavaScript, with API known as WebExtensions, which is designed to be compatible with Google Chrome and Microsoft Edge extension systems.[69] Firefox previously supported add-ons using the XUL and XPCOM APIs, which allowed them to directly access and manipulate much of the browser's internal functionality. As compatibility was not included in the multi-process architecture, XUL add-ons have been deemed Legacy add-ons and are no longer supported on Firefox 57 "Quantum" and newer.[70] [71]

Mozilla has occasionally installed extensions for users without their permission. This happened in 2017 when an extension designed to promote the show Mr. Robot was silently added in an update to Firefox.[72] [73]

Themes

Firefox can have themes added to it, which users can create or download from third parties to change the appearance of the browser.[74] [75]

Guest session

In 2013, Firefox for Android added a guest session mode, which wiped browsing data such as tabs, cookies, and history at the end of each guest session. Guest session data was kept even when restarting the browser or device, and deleted only upon a manual exit. The feature was removed in 2019, purportedly to "streamline the experience".[76] [77]

Standards

Firefox implements many web standards, including HTML4 (almost full HTML5), XML, XHTML, MathML, SVG 1.1 (full),[78] SVG 2 (partial),[79] [80] CSS (with extensions),[81] ECMAScript (JavaScript), DOM, XSLT, XPath, and APNG (Animated PNG) images with alpha transparency.[82] Firefox also implements standards proposals created by the WHATWG such as client-side storage,[83] [84] and the canvas element.[85] These standards are implemented through the Gecko layout engine, and SpiderMonkey JavaScript engine. Firefox 4 was the first release to introduce significant HTML5 and CSS3 support.

Firefox has passed the Acid2 standards-compliance test since version 3.0.[86] 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.[87] Because the SVG font tests were removed from the Acid3 test in September 2011, Firefox 4 and greater scored 100/100.[88] [89]

Firefox also implements "Safe Browsing,"[90] a proprietary protocol[91] from Google used to exchange data related with phishing and malware protection.

Firefox supports the playback of video content protected by HTML5 Encrypted Media Extensions (EME), since version 38. 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,[92] "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. Mozilla justified its partnership with Adobe and Google by stating:

and that it is "an important step on Mozilla's roadmap to remove NPAPI plugin support."[93] Upon the introduction of EME support, builds of Firefox on Windows were also introduced that exclude support for EME.[94] [95] The Free Software Foundation and Cory Doctorow condemned Mozilla's decision to support EME.[96]

Security

See also: Browser security.

From its inception, Firefox was positioned as a security-focused browser. At the time, Internet Explorer, the dominant browser, was facing a security crisis. Multiple vulnerabilities had been found, and malware like Download.Ject could be installed simply by visiting a compromised website. The situation was so bad that the US Government issued a warning against using Internet Explorer.[97] Firefox, being less integrated with the operating system, was considered a safer alternative since it was less likely to have issues that could completely compromise a computer. This led to a significant increase in Firefox's popularity during the early 2000s as more secure alternative.[98] [99] Moreover, Firefox was considered to have fewer actively exploitable security vulnerabilities compared to its competitors. In 2006, The Washington Post reported that exploit code for known security vulnerabilities in Internet Explorer were available for 284 days compared to only nine days for Firefox before the problem was fixed.[100] A Symantec study around the same period showed that even though Firefox had a higher number of vulnerabilities, on average vulnerabilities were fixed faster in Firefox than in other browsers during that period.[101]

During this period, Firefox used a monolithic architecture, like most browsers at the time. This meant all browser components ran in a single process with access to all system resources. This setup had multiple security issues. If a web page used too many resources, the entire Firefox process would hang or crash, affecting all tabs. Additionally, any exploit could easily access system resources, including user files. Between 2008 and 2012, most browsers shifted to a multiprocess architecture, isolating high-risk processes like rendering, media, GPU, and networking.[102] However, Firefox was slower to adopt this change. It wasn't until 2015 that Firefox started its Electrolysis (e10s) project to implement sandboxing across multiple components. This rewrite relied on interprocess communication using Chromium's interprocess communication library and placed various component including the rendering component in its own sandbox.[103] Firefox released this rewrite in to beta in August 2016, noting a 10-20% increase in memory usage, which was lower than Chrome's at the time.[104] However, the rewrite caused issues with their legacy extension API, which was not designed to work cross-process and required shim code to function correctly. After over a year in beta, the rewrite was enabled by default all users of Firefox in November 2017.[105]

In 2012, Mozilla launched a new project called Servo to write a completely new and experimental browser engine utilizing memory safe techniques written in Rust.[106] In 2018, Mozilla opted to integrate parts of the Servo project into the Gecko engine in a project codenamed the Quantum project.[107] The project completely overhauled Firefox's page rendering code resulting in performance and stability gains while also improving the security of existing components.[108] Additionally, the older incompatible extension API was removed in favour of a WebExtension API that more closely resembled Google Chrome's extension system. This broke compatibility with older extensions but resulted in lesser vulnerabilities and a much more maintainable extension system.[109] While the Servo project was intended to replace more parts of the Gecko Engine,[110] this plan never came to fruition. In 2020, Mozilla laid off all developers on the Servo team transferring ownership of the project to the Linux Foundation.[111]

Privacy

When Firefox initially released, it used a custom script permission policy where scripts that were signed by the page could gain access to higher privilege actions such as the ability to set a user's preferences. However, this model was not widely used and was later discontinued by Firefox. Modern day Firefox instead follows the standard same-origin policy permission model that is followed by most modern browsers which disallows scripts from accessing any privileged data including data about other websites.[112]

It uses TLS to protect communications with web servers using strong cryptography when using the HTTPS protocol.[113] The freely available HTTPS Everywhere add-on enforces HTTPS, even if a regular HTTP URL is entered. Firefox now supports HTTP/2.[114]

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.[115] [116]

Version 23, released in August 2013, followed the lead of its competitors by blocking iframe, stylesheet, and script resources served from non-HTTPS servers embedded on HTTPS pages by default. Additionally, JavaScript could also no longer be disabled through Firefox's preferences, and JavaScript was automatically re-enabled for users who upgraded to 23 or higher with it disabled. The change was made due to the fact the JavaScript was being used across a majority of websites on the web and disabling JavaScript could potentially have untoward repercussions on inexperienced users who are unaware of its impact. Firefox also cited the fact that extensions like NoScript, that can disable JavaScript in a more controlled fashion were widely available. The following release added the ability to disable JavaScript through the developer tools for testing purposes.[117] [118] [119]

Beginning with Firefox 48, 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 to be signed.[120] [121] On May 2, 2019, Mozilla announced that it would be strengthening the signature enforcement with methods that included the retroactive disabling of old extensions now deemed to be insecure.[122]

Since version 60 Firefox includes the option to use DNS over HTTPS (DoH), which causes DNS lookup requests to be sent encrypted over the HTTPS protocol.[123] [124] To use this feature the user must set certain preferences beginning with "network.trr" (Trusted Recursive Resolver) in : if network.trr.mode is 0, DoH is disabled; 1 activates DoH in addition to unencrypted DNS; 2 causes DoH to be used before unencrypted DNS; to use only DoH, the value must be 3. By setting network.trr.uri to the URL, special Cloudflare servers will be activated. Mozilla has a privacy agreement with this server host that restricts their collection of information about incoming DNS requests.[125]

On May 21, 2019, Firefox was updated to include the ability to block scripts that used a computer's CPU to mine cryptocurrency without a user's permission, in Firefox version 67.0. The update also allowed users to block known fingerprinting scripts that track their activity across the web, however it does not resist fingerprinting on its own.[126]

In March 2021, Firefox launched SmartBlock in version 87 to offer protection against cross-site tracking, without breaking the websites users visit.[127] Also known as state partitioning or "total cookie protection", works via a feature in the browser that isolates data from each site visited by the user to ensure that cross-site scripting is very difficult if not impossible. The feature also isolates local storage, service workers and other common ways for sites to store data.[128]

Localizations

Firefox is a widely localized web browser. Mozilla uses the in-house Pontoon localization platform.[129] The first official release in November 2004 was available in 24 different languages and for 28 locales.[130] In 2019, Mozilla released Project Fluent a localization system that allows translators to be more flexible with their translation than to be constrained in one-to-one translation of strings.[131] [132] the supported versions of Firefox are available in 97 locales (88 languages).[133]

Platform availability

The desktop version of Firefox is available and supports Microsoft Windows, macOS, and Linux, while Firefox for Android is available for Android (formerly Firefox for mobile, it also ran on Maemo, MeeGo and Firefox OS) and Firefox for iOS is available for iOS. Smartphones that support Linux but do not support Android or iOS apps can also run Firefox in its desktop version, for example using postmarketOS.

Firefox source code may be compiled for various operating systems; however, officially distributed binaries are provided for the following:

Required hardware and software[134]
RequirementMicrosoft WindowsLinux desktopmacOSAndroid[135] iOS
CPU1GHz or faster compatible processor (or ARM64 for Windows[136])
ESR: Pentium 4 or newer with SSE2 (or ARM64 for Windows)		Any x86-64 and ARM64 CPUARMv7, ARM64, IA-32 and x64[137] ARM64
Memory (RAM)1 GB for the 32-bit version and 2 GB for the 64-bit version
ESR: 512 MB for the 32-bit version and 2 GB for the 64-bit version		384 MB?
Data storage device free space500 MB
ESR: 200 MB		80 MB~128 MB
Operating systemWindows 10 or later
Windows Server 2016 or later
ESR: Windows 7, Server 2008 R2, 8, Server 2012, 8.1 and Server 2012 R2
Minimum
Recommended
macOS 10.15 or newer
ESR: 10.12–10.14		5.0 or neweriOS 15 or later[138]

Microsoft Windows

Firefox 1.0 was released for Windows 95, as well as Windows NT 4.0 or later. Some users reported the 1.x builds were operable (but not installable) on Windows NT 3.51.[139]

The version 42.0 release includes the first x64 build. It required Windows 7 or Server 2008 R2.[140] Starting from version 49.0, Firefox for Windows requires and uses the SSE2 instruction set.

In September 2013, Mozilla released a Metro-style version of Firefox, optimized for touchscreen use, on the "Aurora" release channel. However, on March 14, 2014, Mozilla cancelled the project because of a lack of user adoption.[141] [142] [143]

In March 2017, Firefox 52 ESR, the last version of the browser for Windows XP and Windows Vista, was released.[144] Support for Firefox 52 ESR ended in June 2018.[145]

Traditionally, installing the Windows version of Firefox entails visiting the Firefox website and downloading an installer package, depending on the desired localization and system architecture. In November 2021, Mozilla made Firefox available on Microsoft Store. The Store-distributed package does not interfere with the traditional installation.[146] [147]

The last version of Firefox for Windows 7 and 8 is Firefox 115 ESR, which was released in July 2023.[148] Its end-of-life is planned to be in September 2024.[149]

macOS

The first official release (Firefox version 1.0) supported macOS (then called Mac OS X) on the PowerPC architecture. Mac OS X builds for the IA-32 architecture became available via a universal binary which debuted with Firefox 1.5.0.2 in 2006.

Starting with version 4.0, Firefox was released for the x64 architecture to which macOS had migrated.[150] Version 4.0 also dropped support for PowerPC architecture, although other projects continued development of a PowerPC version of Firefox.[151]

Firefox was originally released for Mac OS X 10.0 and higher.[152] The minimum OS then increased to Mac OS X 10.2 in Firefox 1.5 and 10.4 in Firefox 3.[153] [154] Firefox 4 dropped support for Mac OS X 10.4 and PowerPC Macs, and Firefox 17 dropped support for Mac OS X 10.5 entirely.[155] [156] The system requirements were left unchanged until 2016, when Firefox 49 dropped support for Mac OS X 10.6–10.8.[157] [158] Mozilla ended support for OS X 10.9–10.11 in Firefox 79, with those users being supported on the Firefox 78 ESR branch until November 2021.[159] [160] [161] Most recently, Mozilla ended support for macOS 10.12–10.14 in Firefox 116, with those users being supported on the Firefox 115 ESR branch until late 2024.

Linux

Since its inception, Firefox for Linux supported the 32-bit memory architecture of the IA-32 instruction set. 64-bit builds were introduced in the 4.0 release. The 46.0 release replaced GTK 2.18 with 3.4 as a system requirement on Linux and other systems running X.Org.[162] Starting with 53.0, the 32-bit builds require the SSE2 instruction set.[163]

Firefox for Android

See main article: Firefox for Android.

Firefox for mobile, code-named "Fennec", was first released for Maemo in January 2010 with version 1.0[164] and for Android in March 2011 with version 4.0.[165] Support for Maemo was discontinued after version 7, released in September 2011.[166] Fennec had a user interface optimized for phones and tablets. It included the Awesome Bar, tabbed browsing, add-on support, a password manager, location-aware browsing, and the ability to synchronize with the user's other devices with Mozilla Firefox using Firefox Sync.[167] At the end of its existence, it had a market share of 0.5% on Android.[168]

In August 2020, Mozilla launched a new version of its Firefox for Android app, named Firefox Daylight to the public[169] and codenamed Fenix, after a little over a year of testing.[170] It boasted higher speeds with its new GeckoView engine, which is described as being "the only independent web engine browser available on Android". It also added Enhanced Tracking Protection 2.0, a feature that blocks many known trackers on the Internet.[171] It also added the ability to place the address bar on the bottom, and a new Collections feature. However, it was criticized for only having nine Add-ons at launch, and missing certain features.[172] [173] [174] In response, Mozilla stated that they will allow more Add-ons with time.[175]

Firefox for iOS

Mozilla initially refused to port Firefox to iOS, due to the restrictions Apple imposed on third-party iOS browsers. Instead of releasing a full version of the Firefox browser, Mozilla released Firefox Home, a companion app for the iPhone and iPod Touch based on the Firefox Sync technology, which allowed users to access their Firefox browsing history, bookmarks, and recent tabs. It also included Firefox's "Awesomebar" location bar. Firefox Home was not a web browser, the application launched web pages in either an embedded viewer for that one page, or by opening the page in the Safari app.[176] [177] Mozilla pulled Firefox Home from the App Store in September 2012, stating it would focus its resources on other projects. The company subsequently released the source code of Firefox Home's underlying synchronization software.[178]

In April 2013, then-Mozilla CEO Gary Kovacs said that Firefox would not come to iOS if Apple required the use of the WebKit layout engine to do so. One reason given by Mozilla was that prior to iOS 8, Apple had supplied third-party browsers with an inferior version of their JavaScript engine which hobbled their performance, making it impossible to match Safari's JavaScript performance on the iOS platform.[179] Apple later opened their "Nitro" JavaScript engine to third-party browsers.[180] In 2015, Mozilla announced it was moving forward with Firefox for iOS, with a preview release made available in New Zealand in September of that year.[181] [182] [183] It was fully released in November later that year.[184] It is the first Firefox-branded browser not to use the Gecko layout engine as is used in Firefox for desktop and mobile. Apple's policies require all iOS apps that browse the web to use the built-in WebKit rendering framework and WebKit JavaScript, so using Gecko is not possible.[185] [186] Unlike Firefox on Android, Firefox for iOS does not support browser add-ons.

In November 2016, Firefox released a new iOS app titled Firefox Focus, a private web browser.[187]

Firefox Reality (AR/VR)

Firefox Reality was released for Augmented Reality and Virtual Reality headsets in September 2018.[188] It supports traditional web-browsing through 2D windows and immersive VR pages through Web VR. Firefox Reality is available on HTC Vive, Oculus, Google Daydream and Microsoft Hololens headsets. In February 2022 Mozilla announced that Igalia took over stewardship of this project under the new name of Wolvic.[189]

Unofficial ports

Firefox has also been ported to FreeBSD,[190] NetBSD,[191] OpenBSD,[192] OpenIndiana,[193] OS/2,[194] ArcaOS,[195] SkyOS, RISC OS[196] and BeOS/Haiku,[197] [198] [199] [200] and an unofficial rebranded version called Timberwolf has been available for AmigaOS 4.[201] An unofficial continuation of the Mac OS X PowerPC release was actively developed as TenFourFox until October 5, 2021.[202]

The Firefox port for OpenBSD is maintained by Landry Breuil since 2010. Firefox is regularly built for the current branch of the operating system, the latest versions are packaged for each release and remain frozen until the next release. In 2017, Landry began hosting packages of newer Firefox versions for OpenBSD releases from 6.0 onwards, making them available to installations without the ports system.[203]

The Solaris port of Firefox (including OpenSolaris) was maintained by the Oracle Solaris Desktop Beijing Team,[204] [205] until March 2017 when the team was disbanded. There was also an unofficial port of Firefox 3.6.x to IBM AIX[206] [207] and of v1.7.x to UnixWare.[208]

Channels and release schedule

In March 2011, Mozilla presented plans to switch to the rapid release model, a faster 16-week development cycle, similar to Google Chrome. Ars Technica noted that this new cycle entailed "significant technical and operational challenges" for Mozilla (notably preserving third-party add-on compatibility), but that it would help accelerate Firefox's adoption of new web standards, feature, and performance improvements.[209] [210] This plan was implemented in April 2011.[211] The release process was split into four "channels", with major releases trickling down to the next channel every six to eight weeks. For example, the Nightly channel would feature a preliminary unstable version of Firefox 6, which would move to the experimental "Aurora" channel after preliminary testing, then to the more stable "beta" channel, before finally reaching the public release channel, with each stage taking around six weeks.[212] [213] For corporations, Mozilla introduced an Extended Support Release (ESR) channel, with new versions released every 30 weeks (and supported for 12 more weeks after a new ESR version is released), though Mozilla warned that it would be less secure than the release channel, since security patches would only be backported for high-impact vulnerabilities.[214] [215]

In 2017, Mozilla abandoned the Aurora channel, which saw low uptake, and rebased Firefox Developer Edition onto the beta channel.[216] Mozilla uses A/B testing[217] and a staged rollout mechanism for the release channel, where updates are first presented to a small fraction of users, with Mozilla monitoring its telemetry for increased crashes or other issues before the update is made available to all users.[212] In 2020, Firefox moved to a four-week release cycle, to catch up with Chrome in support for new web features.[218] [219] Chrome switched to a four-week cycle a year later.[220]

Licensing

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, including Firefox's predecessor Netscape,[221] the customizable Pale Moon, and the privacy focused Tor Browser.[222]

In the past, Firefox was licensed solely under the MPL, then version 1.1,[223] 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.[224] [225] 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,[226] and with the release of Firefox 13 on June 5, 2012, Mozilla used it to replace the tri-licensing scheme.[227]

Trademark and logo

See also: Mozilla software rebranded by Debian.

The name "Mozilla Firefox" is a registered trademark of Mozilla; 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.[228] The name "Firefox" derives from a nickname of the red panda.

Mozilla has placed the Firefox logo files under open-source licenses,[229] [230] but its trademark guidelines do not allow displaying altered[231] or similar logos[232] in contexts where trademark law applies.[233]

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".[234]

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 was asked either to comply with the published trademark guidelines or cease using the "Firefox" name in their distribution.[235] 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 separate branding.[236]

Branding and visual identity

See main article: Firefox logo. The Firefox icon is a trademark used to designate the official Mozilla build of the Firefox software and builds of official distribution partners.[237] For this reason, software distributors who distribute modified versions of Firefox do not use the icon.[238]

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 authored an article covering everything he considered to be wrong with Mozilla's visual identity.[239]

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.[240] [241] The logo was later revised and updated, fixing several flaws found when it was enlarged.[242] 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 was not widely known.

In June 2019, Mozilla unveiled a revised Firefox logo, which was officially implemented on version 70. The new logo is part of an effort to build a brand system around Firefox and its complementary apps and services, which are now being promoted as a suite under the Firefox brand.

Promotion

Firefox was adopted rapidly, with 100 million downloads in its first year of availability.[243] 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".[244]

Firefox continued to heavily market itself by releasing a marketing portal dubbed "Spread Firefox" (SFX) on September 12, 2004.[245] 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."[246] 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.[247] 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.[248] This resulted in an official certified Guinness world record, with over eight million downloads.[249] 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."[250]

In celebration of the third anniversary of the founding of the Mozilla Foundation, the "World Firefox Day" campaign was established on July 15, 2006,[251] [252] and ran until September 15, 2006.[253] 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 was 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.[254] After Firefox reached 500 million downloads on February 21, 2008, the Firefox community celebrated by visiting Freerice to earn 500 million grains of rice.[255]

Other initiatives included Live Chat – a service Mozilla launched in 2007 that allowed users to seek technical support from volunteers.[256] The service was later retired.[257]

To promote the launch of Firefox Quantum in November 2017, Mozilla partnered with Reggie Watts to produce a series of TV ads and social media content.[258]

Performance

2000s

In December 2005, Internet Week ran an article in which many readers reported high memory usage in Firefox 1.5.[259] 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.[260] Other known causes of memory problems were malfunctioning extensions such as Google Toolbar and some older versions of AdBlock,[261] or plug-ins, such as older versions of Adobe Acrobat Reader.[262] 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.[263]

In 2006, Softpedia noted that Firefox 1.5 took longer to start up than other browsers,[264] which was confirmed by further speed tests.[265]

Internet Explorer 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.[266] 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.[267] [268] 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.[269] [270] [271] In mid-2009, BetaNews benchmarked Firefox 3.5 and declared that it performed "nearly ten times better on XP than Microsoft Internet Explorer 7".[272]

2010s

In January 2010, Lifehacker compared the performance of Firefox 3.5, Firefox 3.6, Google Chrome 4 (stable and Dev versions), Safari 4, and Opera (10.1 stable and 10.5 pre-alpha versions). Lifehacker timed how long browsers took to start and reach a page (both right after boot-up and after running at least once already), timed how long browsers took to load nine tabs at once, tested JavaScript speeds using Mozilla's Dromaeo online suite (which implements Apple's SunSpider and Google's V8 tests) and measured memory usage using Windows 7's process manager. They concluded that Firefox 3.5 and 3.6 were the fifth- and sixth-fastest browsers, respectively, on startup, 3.5 was third- and 3.6 was sixth-fastest to load nine tabs at once, 3.5 was sixth- and 3.6 was fifth-fastest on the JavaScript tests. They also concluded that Firefox 3.6 was the most efficient with memory usage followed by Firefox 3.5.[273]

In February 2012, Tom's Hardware performance tested Chrome 17, Firefox 10, Internet Explorer 9, Opera 11.61, and Safari 5.1.2 on Windows 7. Tom's Hardware summarized their tests into four categories: Performance, Efficiency, Reliability, and Conformance. In the performance category they tested HTML5, Java, JavaScript, DOM, CSS 3, Flash, Silverlight, and WebGL (WebGL 2 is current as of version 51; and Java and Silverlight stop working as of version 52)—they also tested startup time and page load time. The performance tests showed that Firefox was either "acceptable" or "strong" in most categories, winning three categories (HTML5, HTML5 hardware acceleration, and Java) only finishing "weak" in CSS performance. In the efficiency tests, Tom's Hardware tested memory usage and management. In this category, it determined that Firefox was only "acceptable" at performing light memory usage, while it was "strong" at performing heavy memory usage. In the reliability category, Firefox performed a "strong" amount of proper page loads. In the final category, conformance, it was determined that Firefox had "strong" conformance for JavaScript and HTML5. In conclusion, Tom's Hardware determined that Firefox was the best browser for Windows 7 OS, but that it only narrowly beat Google Chrome.[274]

In June 2013, Tom's Hardware again performance tested Firefox 22, Chrome 27, Opera 12, and Internet Explorer 10. They found that Firefox slightly edged out the other browsers in their "performance" index, which examined wait times, JavaScript execution speed, HTML5/CSS3 rendering, and hardware acceleration performance. Firefox also scored the highest on the "non-performance" index, which measured memory efficiency, reliability, security, and standards conformance, finishing ahead of Chrome, the runner-up. Tom's Hardware concluded by declaring Firefox the "sound" winner of the performance benchmarks.[275]

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.[276]

In benchmark testing in early 2015 on a "high-end" Windows machine, comparing Microsoft Edge, Internet Explorer, Firefox, Chrome, and Opera, Firefox achieved the highest score on three of the seven tests. Four different JavaScript performance tests gave conflicting results. Firefox surpassed all other browsers on the Peacekeeper benchmark but was behind the Microsoft products when tested with SunSpider. Measured with Mozilla's Kraken, it came second place to Chrome, while on Google's Octane challenge it took third behind Chrome and Opera. Firefox took the lead with WebXPRT, which runs several typical HTML5 and JavaScript tasks. Firefox, Chrome, and Opera all achieved the highest possible score on the Oort Online test, measuring WebGL rendering speed (WebGL 2 is now current). In terms of HTML5 compatibility testing, Firefox was ranked in the middle of the group.[277]

A similar set of benchmark tests in 2016 showed Firefox's JavaScript performance on Kraken and the newer Jetstream tests trailing slightly behind all other tested browsers except Internet Explorer (IE), which performed relatively poorly. On Octane, Firefox came ahead of IE and Safari, but again slightly behind the rest, including Vivaldi and Microsoft Edge. Edge took overall first place on the Jetstream and Octane benchmarks.[278]

Firefox Quantum

As of the adoption of Firefox 57 and Mozilla's Quantum project entering production browsers in November 2017, Firefox was tested to be faster than Chrome in independent JavaScript tests, and demonstrated to use less memory with many browser tabs opened.[279] [280] TechRadar rated it as the fastest web browser in a May 2019 report.[281]

Usage share

Downloads have continued at an increasing rate since Firefox 1.0 was released on November 9, 2004, and Firefox had already been downloaded over one billion times.[282] This number does not include downloads using software updates or those from third-party websites.[283] 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.

In July 2010, IBM asked all employees (about 400,000) to use Firefox as their default browser.[284]

Firefox was the second-most used web browser until November 2011, when Google Chrome surpassed it.[285] According to Mozilla, Firefox had more than 450 million users .[286] [287]

In July 2024, Firefox was the fourth-most widely used desktop browser, and it was the fourth-most popular with 2.75% of worldwide usage share of web browsers across all platforms.[288]

According to the Firefox Public Data report by Mozilla, the active monthly count of Desktop clients has decreased from around 310 million in 2017 to 200 million in 2023.[289] From Oct 2020, the desktop market share of Firefox started to decline in countries where it used to be the most popular.In Eritrea, it dropped from 50% in Oct 2020 to 9.32% in Sept 2021.In Cuba, it dropped from 54.36% in Sept 2020 to 38.42% in Sept 2021.[290] [291]

The UK[292] and US[293] governments both follow the 2% rule. This states that only browsers with more than 2% market share among visitors of their websites will be supported. There are concerns that support for Firefox will be dropped because as of December 29, 2023, the browser market share among US government website visitors is 2.2%.[294]

See also

Further reading

External links

Notes and References

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  2. Web site: The Mozilla Firefox Open Source Project on Open Hub: Languages Page . October 15, 2021 . openhub.net . October 7, 2021 . https://web.archive.org/web/20211007234007/https://www.openhub.net/p/firefox/analyses/latest/languages_summary . live.
  3. Web site: Firefox for Android upgrade FAQs . August 16, 2020 . August 12, 2020 . https://web.archive.org/web/20200812152044/https://support.mozilla.org/en-US/kb/firefox-android-upgrade-faqs?redirectslug=firefox-preview-upgrade-faqs&redirectlocale=en-US . live.
  4. Web site: Mozilla . October 20, 2014 . https://web.archive.org/web/20141021035640/https://www.mozilla.org/en-US/about/legal/eula/ . October 21, 2014 . live.
  5. Web site: Debian and Mozilla – a study in trademarks . January 10, 2005 . . https://web.archive.org/web/20170801163012/https://lwn.net/Articles/118268/ . August 1, 2017 . September 14, 2011 . Corbet, Jonathan . live.
  6. Web site: Gecko Layout Engine . July 17, 2008 . download-firefox.org . https://web.archive.org/web/20100615131607/http://download-firefox.org/spread-firefox/gecko-layout-engine-and-mozilla-firefox/ . June 15, 2010 . May 10, 2012.
  7. Web site: FreeBSD ports . March 24, 2018 . https://web.archive.org/web/20190323104221/https://svnweb.freebsd.org/ports/head/www/firefox/ . March 23, 2019 . live.
  8. Web site: OpenBSD ports . March 24, 2018 . https://web.archive.org/web/20190120074628/http://cvsweb.openbsd.org/cgi-bin/cvsweb/ports/www/mozilla-firefox/ . January 20, 2019 . live.
  9. Web site: NetBSD pkgsrc . October 31, 2018 . https://web.archive.org/web/20181101015707/http://cvsweb.netbsd.org/bsdweb.cgi/pkgsrc/www/firefox/ . November 1, 2018 . live.
  10. Web site: Firefox for Fire TV . Amazon . live . https://web.archive.org/web/20200707103351/https://www.amazon.com/Mozilla-Firefox-for-Fire-TV/dp/B078B5YMPD . July 7, 2020 . July 17, 2020 .
  11. News: Curtains for Netscape – Tech Bytes . Jay . Paul . February 28, 2008 . CBC News . June 26, 2015 . https://web.archive.org/web/20150705110100/http://www.cbc.ca/technology/technology-blog/2008/02/curtains-for-netscape.html . July 5, 2015 . live.
  12. Web site: Firefox browser takes on Microsoft . November 9, 2004 . . https://web.archive.org/web/20171220113953/http://news.bbc.co.uk/2/hi/technology/3993959.stm . December 20, 2017.
  13. Web site: The assault on software giant Microsoft . Weber . Tim . May 9, 2005 . . https://web.archive.org/web/20170925233936/http://news.bbc.co.uk/2/hi/business/4508897.stm . September 25, 2017.
  14. Web site: Introducing the New Firefox: Firefox Quantum . Mayo . Mark . November 14, 2017 . The Mozilla Blog . https://web.archive.org/web/20180627114050/https://blog.mozilla.org/blog/2017/11/14/introducing-firefox-quantum/ . June 27, 2018 . May 26, 2018.
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  16. Web site: StatCounter Global Stats – Browser, OS, Search Engine including Mobile Usage Share . StatCounter Global Stats . July 14, 2018 . https://archive.today/20120526/http://gs.statcounter.com/%23mobile_browser-ww-monthly-201012-201111-bar#browser_version-ww-weekly-200827-200951 . May 26, 2012 . live.
  17. Web site: StatCounter global stats – Top 12 browser versions . StatCounter . March 12, 2010 . https://archive.today/20120526/http://gs.statcounter.com/%23mobile_browser-ww-monthly-201012-201111-bar#browser_version-ww-monthly-200902-201006 . May 26, 2012 . live.
  18. Web site: Desktop Browser Market Share Worldwide . December 3, 2023 . StatCounter Global Stats . en . October 11, 2017 . https://web.archive.org/web/20171011022101/https://gs.statcounter.com/browser-market-share/desktop/worldwide#monthly-202211-202311 . live .
  19. Web site: Desktop Browser Market Share Worldwide . December 3, 2023 . StatCounter Global Stats . en . October 11, 2017 . https://web.archive.org/web/20171011022101/https://gs.statcounter.com/browser-market-share/desktop/worldwide#daily-20231102-20231201 . live .
  20. Web site: Goodger . Ben . Ben Goodger . Where Did Firefox Come From? . Inside Firefox . MozillaZine Weblogs . February 6, 2006 . https://web.archive.org/web/20110623034401/http://weblogs.mozillazine.org/ben/archives/009698.html . June 23, 2011 . January 7, 2012.
  21. Book: Yeow, Cheah Chu . 2005 . Firefox Secrets . SitePoint Pty Ltd . 978-0-9752402-4-3 . December 12, 2015 . https://web.archive.org/web/20190323104230/https://books.google.com/books?id=sfciobmzOOcC . March 23, 2019 . live.
  22. Happy Birthday, Firefox: The Little Web Browser That Could Turns 10 . Gilbertson . Scott . September 24, 2012 . Wired . September 20, 2019 . https://web.archive.org/web/20170805143306/https://www.wired.com/2012/09/happy-birthday-firefox-the-little-web-browser-that-could-turns-10/ . August 5, 2017 . live.
  23. Web site: mozilla development roadmap . Eich . Brendan . Brendan Eich . Hyatt . David . Dave Hyatt . April 2, 2003 . . August 2, 2009 . https://web.archive.org/web/20090410050040/http://www-archive.mozilla.org/roadmap/roadmap-02-Apr-2003.html . April 10, 2009 . live.
  24. See:
    • Web site: Phoenix 0.1 (Pescadero) release Notes and FAQ . May 28, 2003 . mozilla.org . February 26, 2018 . https://web.archive.org/web/20030528145420/http://www.mozilla.org/projects/firebird/0.1-release-notes.html . May 28, 2003.
    • Web site: Phoenix 0.2 (Santa Cruz) release Notes and FAQ . December 3, 2003 . mozilla.org . February 26, 2018 . https://web.archive.org/web/20031203013057/http://www.mozilla.org/projects/firebird/0.2-release-notes.html . December 3, 2003.
    • Web site: Phoenix 0.3 (Lucia) release Notes and FAQ . December 3, 2003 . mozilla.org . February 26, 2018 . https://web.archive.org/web/20031203013057/http://www.mozilla.org/projects/firebird/0.3-release-notes.html . December 3, 2003.
    • Web site: Phoenix 0.4 (Oceano) Release Notes and FAQ . December 3, 2003 . mozilla.org . February 26, 2018 . https://web.archive.org/web/20031203013057/http://www.mozilla.org/projects/firebird/0.4-release-notes.html . December 3, 2003.
    • Web site: Phoenix 0.5 (Naples) Release Notes and FAQ . December 3, 2003 . mozilla.org . February 26, 2018 . https://web.archive.org/web/20031203013057/http://www.mozilla.org/projects/firebird/0.5-release-notes.html . December 3, 2003.
    • Web site: Mozilla Firebird 0.6 Release Notes and FAQ . December 3, 2003 . mozilla.org . February 26, 2018 . https://web.archive.org/web/20031203013057/http://www.mozilla.org/projects/firebird/0.6-release-notes.html . December 3, 2003.
    • Web site: Mozilla Firebird 0.6.1 Release Notes and FAQ . December 3, 2003 . mozilla.org . February 26, 2018 . https://web.archive.org/web/20031203013057/http://www.mozilla.org/projects/firebird/0.6.1-release-notes.html . December 3, 2003.
    • Web site: Mozilla Firebird 0.7 Release Notes . October 28, 2003 . mozilla.org . February 26, 2018 . https://web.archive.org/web/20031028041058/http://www.mozilla.org/projects/firebird/0.7-release-notes.html . October 28, 2003.
  25. Web site: Mozilla browser becomes Firebird . IBPhoenix . January 30, 2007 . https://web.archive.org/web/20070914035447/http://www.ibphoenix.com/main.nfs?a=ibphoenix&page=ibp_Mozilla0 . September 14, 2007.
  26. News: Mozilla's Firebird gets wings clipped . Festa . Paul . May 7, 2003 . live . https://web.archive.org/web/20180629063203/https://www.cnet.com/news/mozillas-firebird-gets-wings-clipped/ . June 29, 2018 . . January 30, 2007.
  27. News: Mozilla holds 'fire' in naming fight . Festa . Paul . February 9, 2004 . live . https://web.archive.org/web/20180629063422/https://www.cnet.com/news/mozilla-holds-fire-in-naming-fight/ . June 29, 2018 . . January 24, 2007.
  28. Web site: Red panda . https://web.archive.org/web/20140111062619/http://www.bbc.co.uk/nature/life/Red_Panda . January 11, 2014 . BBC Nature . August 20, 2014.
  29. Web site: Firefox name FAQ . Garrity . Steven . Markham . Gervase . Goodger . Ben . Decrem . Bart . etal . mozilla.org . https://web.archive.org/web/20120228204829/http://www.mozilla.org/projects/firefox/firefox-name-faq.html . February 28, 2012 . March 13, 2012.
  30. Web site: Firefox 1.5 Release Notes . November 29, 2005 . mozilla.org archive . November 17, 2014 . https://web.archive.org/web/20141118131918/http://website-archive.mozilla.org/www.mozilla.org/firefox_releasenotes/en-US/firefox/releases/1.5.html#FAQ . November 18, 2014 . live.
  31. Web site: Better Browser Now the Best . September 29, 2004 . subscription . . May 20, 2020 . May 3, 2019 . https://web.archive.org/web/20190503084908/https://www.forbes.com/2004/09/29/cx_ah_0929tentech.html . live.
  32. Web site: How to Protect Yourself From Vandals, Viruses If You Use Windows . Walter S. . Mossberg . Personal Technology from The Wall Street Journal . September 17, 2004 . https://web.archive.org/web/20040917095122/http://ptech.wsj.com/archive/ptech-20040916.html . September 17, 2004.
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  34. Web site: Firefox 1.0 Release Notes . November 9, 2004 . mozilla.org archive . June 26, 2018 . https://web.archive.org/web/20180627005158/https://website-archive.mozilla.org/www.mozilla.org/firefox_releasenotes/en-US/firefox/releases/1.0.html . June 27, 2018 . live.
  35. Web site: Mozilla Firefox Release Notes . September 20, 2021 . Mozilla . en . September 17, 2021 . https://web.archive.org/web/20210917224831/https://www.mozilla.org/en-US/firefox/releases/ . live.
  36. News: Inside Mozilla: Firefox fights back . Shankland . Stephen . August 4, 2017 . . October 9, 2017 . https://web.archive.org/web/20170803165258/https://www.cnet.com/special-reports/mozilla-firefox-fights-back-against-google-chrome/ . August 3, 2017 . live.
  37. News: Why you should root for Mozilla's Firefox 57 in the browser wars . Dignan . Larry . August 6, 2017 . . October 9, 2017 . https://web.archive.org/web/20171211021103/https://www.zdnet.com/article/why-you-should-root-for-mozillas-firefox-57-in-the-browser-wars/ . December 11, 2017 . live.
  38. News: Mozilla seeks return to glory with release of Firefox Quantum . Keizer . Gregg . November 14, 2017 . . December 11, 2017 . https://web.archive.org/web/20171223114527/https://www.computerworld.com/article/3237054/internet/mozilla-seeks-return-to-glory-with-release-of-firefox-quantum.html . December 23, 2017 . live . International Data Group.
  39. Web site: Hoffman . Chris . What's New in Firefox Quantum, the Firefox You've Been Waiting For . How-To Geek . October 29, 2021 . en . November 14, 2017 . October 28, 2021 . https://web.archive.org/web/20211028154320/https://www.howtogeek.com/332449/whats-new-in-firefox-quantum/ . live.
  40. Web site: Firefox's performance settings Firefox Help . support.mozilla.org . October 29, 2021 . October 29, 2021 . https://web.archive.org/web/20211029162332/https://support.mozilla.org/en-US/kb/performance-settings . live. (about:config property: dom.ipc.processCount.web)
  41. Web site: Update Regarding Add-ons in Firefox . Mozilla . May 4, 2019 . May 4, 2019 . Needham, Kev . https://web.archive.org/web/20190504142118/https://blog.mozilla.org/addons/2019/05/04/update-regarding-add-ons-in-firefox/ . May 4, 2019 . live.
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