Firefox

Free and open-source web browser developed by Mozilla

This article is about the web browser. For other uses, see Firefox (disambiguation).

"Phoenix (web browser)" redirects here. For the early-1990s web browser developed at the University of Chicago, see Phoenix (tkWWW-based browser).

It has been suggested that Firefox Lite be merged into this article. (Discuss) Proposed since May 2025.

|

Firefox

Logo used since October 2019

Firefox 140.0.2 (64-bit) running on OpenSUSE operating system

Developer(s)|

* Mozilla Foundation and its contributors
* Mozilla Corporation

Initial release| November 9, 2004; 20 years ago (2004-11-09)
Stable release(s) [±]
| Standard| 141.0[1]  / July 22, 2025; 12 days ago (July 22, 2025)

|

Extended support release 1| 140.1.0esr[2]  / July 22, 2025; 12 days ago (July 22, 2025)
Extended support release 2| 128.13.0esr[3] / July 22, 2025; 12 days ago (2025-07-22)
Extended support release 3| 115.26.0esr[4] / July 22, 2025; 12 days ago (2025-07-22)
Preview release(s) [±]
| Beta & developer edition| 142.0b5[5]  / July 30, 2025; 4 days ago (July 30, 2025)

|

Nightly| 143.0a1[6]  / July 21, 2025; 13 days ago (July 21, 2025)
Repository|

* github.com/mozilla-firefox/firefox

Written in| C++, JavaScript, HTML, C, Rust, and others[7][8]
Engines| Gecko, Quantum, and SpiderMonkey; WebKit on iOS/iPadOS
Operating system|

* Linux
* macOS Sierra or later
* Windows 7 or later
* Android Lollipop or later[9]
* iOS 15 or later
* iPadOS 15 or later

Included with| Various Unix-like operating systems
Available in| 97 languages[10]
Type| Web browser
License| MPL 2.0[11][12]
Website| mozilla.org/firefox

Mozilla Firefox, or simply Firefox, is a free and open-source[13] 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.[14] Firefox is available for Windows 10 or later versions of Windows, macOS, and Linux. Its unofficial ports are available for various Unix and Unix-like operating systems, including FreeBSD,[15] OpenBSD,[16] NetBSD,[17] and other operating systems, such as ReactOS. Firefox 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.[18]

Firefox is the spiritual successor of Netscape Navigator, as the Mozilla community was created by Netscape in 1998, before its acquisition by AOL.[19] 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,[20] and challenged Internet Explorer's dominance with 60 million downloads within nine months.[21] In November 2017, Firefox began incorporating new technology under the code name "Quantum" to promote parallelism and a more intuitive user interface.[22]

Firefox usage share grew to a peak of 32.21% in November 2009,[23] with Firefox 3.5 overtaking Internet Explorer 7, although not all versions of Internet Explorer as a whole;[24][25] its usage then declined in competition with Google Chrome.[23] As of February 2025[update], according to StatCounter, it had a 6.36% 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 (14%), and Safari (8.65%).[26]

## History

[edit]

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.[27] 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.[28] Version 0.1 was released on September 23, 2002.[29] On April 3, 2003, the Mozilla Organization announced that it planned to change its focus from the Mozilla Suite to Firefox and Thunderbird.[30]

Screenshot of Phoenix 0.1 on Windows XP

The Firefox project has undergone several name changes.[31] 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.[32][33] 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.[34] The name Firefox was said to be derived from a nickname of the red panda,[35] which became the mascot for the newly named project.[36] For the abbreviation of Firefox, Mozilla prefers Fx or fx, although it is often abbreviated as FF[37] or Ff.

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[38] and The Wall Street Journal.[39] 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 so quickly.[40] 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.[citation needed] Microsoft responded by releasing Windows XP Service Pack 2, which added several important security features to Internet Explorer 6.[41]

Version 1.0 of Firefox was released on November 9, 2004.[42] 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.[43]

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.[44][45][46] 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.[47][48]

On May 3, 2019, the expiry of an intermediate signing certificate on Mozilla servers caused Firefox to automatically disable and lock all browser extensions (add-ons).[49][50] Mozilla began the roll-out of a fix shortly thereafter, using their Mozilla Studies component.[49][50]

Support for Adobe Flash was dropped on January 6, 2021, with the release of Firefox 85.[51]

On June 1, 2021, Firefox's 'Proton' redesign was offered through its stable release channel[52] after being made available in the beta builds.[53] While users were initially allowed to revert to the old design through about:config, the corresponding key-value pairs reportedly stopped working in later builds, resulting in criticism.[54] These included accessibility concerns[55][56] despite Mozilla's claim to "continue to work with the accessibility community"[57] and had not been resolved as of October 2024[update].[58]

On January 13, 2022, an issue with Firefox's HTTP/3 implementation resulted in a widespread outage for several hours.[59]

On September 26, 2023, Firefox 118.0 introduced on-device translation of web page content.[60]

On January 23, 2024, along with the release of Firefox 122.0, Mozilla introduced an official APT repository for Debian-based Linux distributions.[61]

## Features

[edit]

Main article: List of Firefox features

Features of the desktop edition include tabbed browsing, full-screen mode, spell checking, incremental search, smart bookmarks, bookmarking and downloading through drag and drop,[62][63] a download manager, user profile management,[64] private browsing, bookmark tags, bookmark exporting,[65] offline mode,[66] a screenshot tool, web development tools, a "page info" feature which shows a list of page metadata and multimedia items,[67] a configuration menu at `about:config` for power users, and location-aware browsing (also known as "geolocation") based on a Google service.[68] Firefox has an integrated search system which uses Google by default in most markets.[69][70] DNS over HTTPS is another feature whose default behaviour is determined geographically.[71]

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.[72]

Former features include a File Transfer Protocol (FTP) client for browsing file servers, the ability to block images from individual domains (until version 72),[73] a 3D page inspector (versions 11 to 46), tab grouping (until version 44), and the ability to add customized extra toolbars (until version 28).[74][75][76]

### Browser extensions

[edit]

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.[77] 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.[78][79]

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.[80][81]

### Themes

[edit]

Firefox can have themes added to it, which users can create or download from third parties to change the appearance of the browser.[82][83] Firefox also provides dark, light, and system themes.

### Guest session

[edit]

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".[84][85]

### Standards

[edit]

The result of the Acid3 test on Firefox 17

Firefox implements many web standards, including HTML, XML, XHTML, MathML, SVG 1.1 (full),[86] SVG 2 (partial),[87][88] CSS (with extensions),[89] ECMAScript (JavaScript), DOM, XSLT, XPath, and APNG (Animated PNG) images with alpha transparency.[90] Firefox also implements standards proposals created by the WHATWG such as client-side storage,[91][92] and the canvas element.[93] 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.[94] 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.[95] Because the SVG font tests were removed from the Acid3 test in September 2011, Firefox 4 and greater scored 100/100.[96][97]

Firefox also implements "Safe Browsing,"[98] a proprietary protocol[99] 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,[100] "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:

> Firefox downloads and enables the Adobe Primetime and Google Widevine CDMs by default to give users a smooth experience on sites that require DRM. Each CDM runs in a separate container called a sandbox and you will be notified when a CDM is in use. You can also disable each CDM and opt-out of future updates

— Watch DRM content on Firefox[101]

and that it is "an important step on Mozilla's roadmap to remove NPAPI plugin support."[102] Upon the introduction of EME support, builds of Firefox on Windows were also introduced that exclude support for EME.[103][104] The Free Software Foundation and Cory Doctorow condemned Mozilla's decision to support EME.[105]

## Security

[edit]

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.[106] 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 a more secure alternative.[107][108] 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.[109] 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.[110]

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.[111] 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.[112] 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.[113] 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.[113] After over a year in beta, the rewrite was enabled by default all users of Firefox in November 2017.[114]

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.[115] In 2018, Mozilla opted to integrate parts of the Servo project into the Gecko engine in a project codenamed the Quantum project.[116] The project completely overhauled Firefox's page rendering code resulting in performance and stability gains while also improving the security of existing components.[117] 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 fewer vulnerabilities and a much more maintainable extension system.[118] While the Servo project was intended to replace more parts of the Gecko Engine,[119] 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.[120]

## Privacy

[edit]

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.[121]

It uses TLS to protect communications with web servers using strong cryptography when using the HTTPS protocol.[122] The freely available HTTPS Everywhere add-on enforces HTTPS, even if a regular HTTP URL is entered, this feature is now part of the browser.[123] Firefox supports HTTP/2.[124]

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.[125][126]

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.[127][128][129]

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.[130][131] 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.[132]

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.[133][134] To use this feature the user must set certain preferences beginning with "network.trr" (Trusted Recursive Resolver) in about:config: 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.[135]

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.[136]

In March 2021, Firefox launched SmartBlock in version 87 to offer protection against cross-site tracking, without breaking the websites users visit.[137] Also known as state partitioning or "total cookie protection", SmartBlock 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.[138]

In 2025, Mozilla introduced a terms of use for Firefox, as a means to give more transparency over users' rights and permissions for the browser outside of the Mozilla Public License. The company received criticism centering around a clause that gave Mozilla a "nonexclusive, royalty-free, worldwide license" to use any information that was uploaded or inputted into the browser. The new terms were perceived to reduce privacy, and were seen to be connected to AI, while Mozilla denied that these were the motives.[139] Criticism centered on fears that the license grant covered all data inputted, while Mozilla responded saying that the change "does NOT give us ownership of your data".[140][141] In an attempt to respond to the fallout, Mozilla said that many modified words were to ease readability, increase transparency, formalize existing implicit agreements, and describe the circumstances of a free browser, adding that the AI features are covered by a separate agreement.[141][142] Days later, Mozilla changed the wording of their privacy FAQ,[143] removing a pledge to never "sell your personal data" and revising another section denying allegations that it sold user data, saying that it gathers some information from hideable advertisements as well as chatbot metadata when interacted with, and that the legal definition of "sell" was vague in some jurisdictions.[144][145]

## Localizations

[edit]

Firefox is a widely localized web browser. Mozilla uses the in-house Pontoon localization platform.[146] The first official release in November 2004 was available in 24 different languages and for 28 locales.[147] 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.[148][149] As of July 2025,[update] the supported versions of Firefox are available in 97 locales (88 languages).[10]

## Platform availability

[edit]

There are desktop versions of Firefox for 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 not Android, or iOS apps can also run Firefox in its desktop version, for example using postmarketOS, Mobian or Ubuntu Touch.[150]

* view
* talk
* edit

Operating system | Latest stable version  | Support status

|
|

Windows | 10 v1709 and later  | Latest version: 141.0 (ARM64)[1]  | 2019–
Supported: 140.1.0esr (ARM64)[2]
10 and later, Server 2016 and later  | Latest version: 141.0 (x64)[1]  | 2015–
Supported: 140.1.0esr (x64)[2]
Latest version: 141.0 (IA-32)[1]
Supported: 140.1.0esr (IA-32)[2]
7, Server 2008 R2, 8, Server 2012,
8.1 and Server 2012 R2 | Supported: 115.26.0esr (x64)[151] | 2015–2025[152]
Supported: 115.26.0esr (IA-32)[151] | 2009–2025[152]
XP, Server 2003,
Vista and Server 2008 | Unsupported: 52.9.0esr (IA-32)[153][154] | 2004–2018
2000 | Unsupported: 10.0.12esr[155] | 2004–2013
Unsupported: 12.0[156][157][158] | 2004–2012
NT 4.0 (IA-32), 98 and Me | Unsupported: 2.0.0.20[159] | 2004–2008
95 | Unsupported: 1.5.0.12 | 2004–2007
macOS | 11 (ARM64) and later  | Latest version: 141.0[1] [160] | 2020–
Supported: 140.1.0esr[2]
10.15 (x64) and later  | Latest version: 141.0[1]  | 2019–
Supported: 140.1.0esr[2]
10.12–10.14 | Supported: 115.26.0esr[161] | 2016–2025[152]
10.9–10.11 | Unsupported: 78.15.0esr[162][163] | 2013–2021
10.6–10.8 | Unsupported: 45.9.0esr[164] | 2009–2017
Unsupported: 48.0.2[165][166][167][168] | 2009–2016
10.5 (IA-32 and x64)  | Unsupported: 10.0.12esr[155] | 2007–2013
Unsupported: 16.0.2[169] | 2007–2012
10.4 (IA-32 and PPC)–10.5 (PPC)  | Unsupported: 3.6.28[170] | 2005–2012
10.2–10.3 | Unsupported: 2.0.0.20[159] | 2004–2008
10.0–10.1 | Unsupported: 1.0.8 | 2004–2006
Linux (X11/Wayland)  | Latest version: 141.0 (x64)[1]  | 2011–
Supported: 140.1.0esr (x64)[2]
Latest version: 141.0 (IA-32)[1]  | 2004–
Supported: 140.1.0esr (IA-32)[2]

Legend:

Unsupported

Supported

Latest version

Preview version

Future version

Notes

* In March 2014, the Windows Store app version of Firefox was cancelled, although there is a beta release.[171]
* SSE2 instruction set support is required for 49.0 or later for Windows and 53.0 or later for Linux, IA-32 support only applies to superscalar processors.
* The x64 build for Windows (introduced with Firefox 43) was exclusive to Windows 7 and later. All previous versions of Windows have to use the IA-32 build.[172]

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

Required hardware and software[173] Requirement  | Microsoft Windows  | Linux desktop | macOS  | Android[174] | iOS

|
|
|
|
|

CPU |

* 1 GHz or faster compatible processor[175] (ARM64 for the default release is supported on Windows but only for the Nightly release on Linux unless an ARM64 package from the Linux distribution is used[176][177])
* ESR 115: Pentium 4 or newer with SSE2 (or ARM64 for Windows)

| Any x86-64 and ARM64 CPU[175] | ARMv7, ARM64, IA-32 and x64[175] | ARM64
Memory (RAM) |

* 1 GB for the 32-bit version and 2 GB for the 64-bit version
* ESR 115: 512 MB for the 32-bit version and 2 GB for the 64-bit version

| 384 MB  | 2GB
Data storage device free space  |

* 500 MB
* ESR 115: 200 MB

| 80 MB  | ~128 MB[178]
Operating system  |

* Windows 10 or later
* Windows Server 2016 or later[173]
* ESR 115: Windows 7, Server 2008 R2, 8, Server 2012, 8.1 and Server 2012 R2

Minimum

* GTK 3.14 or newer[173]
* libstdc++ 4.8.1 or newer
* X.Org 1.0 or newer
* glibc 2.17 or newer

Recommended

* NetworkManager 0.7 or newer
* DBus 1.0 or newer
* GNOME 2.16 or newer
* PulseAudio
* X.Org 1.7 or newer
* libxtst 1.2.3 or newer

* macOS Catalina or newer[173]
* ESR 115: macOS Sierra–macOS Mojave

| Android Lollipop or newer[9] | iOS 15 or later[178]

### Microsoft Windows

[edit]

Firefox 136 on Windows 10

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.[179]

The version 42.0 release includes the first x64 build. It required Windows 7 or Server 2008 R2.[180] 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.[181][182][183]

In March 2017, Firefox 52 ESR, the last version of the browser for Windows XP and Windows Vista, was released.[184] Support for Firefox 52 ESR ended in June 2018.[185]

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.[186][187]

The last version of Firefox for Windows 7 and 8 is Firefox 115 ESR, which was released in July 2023.[188] Its end-of-life was initially planned to be in October 2024,[189] however in July 2024, a Mozilla employee announced in a comment on Reddit that the company consider extending the support beyond the initial date, the duration of that extension being yet to be defined.[citation needed] In September 2024, the extension was announced for an initial period of six months.[190] In the release calendar page, a note states that Mozilla will re-evaluate the situation in early 2025 to see if another extension will be needed or not and statute about 115 ESR end-of-life then.[191] This extension has been renewed one more time, on February 18, 2025, for 6 additional months, which lead the end-of-life date on par with the 128 ESR branch, in September 2025.[192]

### macOS

[edit]

Firefox 136 on macOS Sonoma

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.[193] Version 4.0 also dropped support for PowerPC architecture, although other projects continued development of a PowerPC version of Firefox.[194]

Firefox was originally released for Mac OS X 10.0 and higher.[195] The minimum OS then increased to Mac OS X 10.2 in Firefox 1.5 and 10.4 in Firefox 3.[196][197] 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.[198][199] The system requirements were left unchanged until 2016, when Firefox 49 dropped support for Mac OS X 10.6–10.8.[200][201] 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.[202][203][204] 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. In September 2024 however, an extension was announced for the 115 ESR branch for an initial period of six months.[190] This extension has been renewed one more time, leading the end-of-life date to September 2025[192]

### Linux

[edit]

Firefox 140 on openSUSE Opening Wikipedia main page with Mozilla Firefox 136 on Fedora Linux 41

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.[193] The 46.0 release replaced GTK 2.18 with 3.4 as a system requirement on Linux and other systems running X.Org.[205] Starting with 53.0, the 32-bit builds require the SSE2 instruction set.[206]

### Firefox for Android

[edit]

Main article: Firefox for Android

Firefox for mobile, code-named "Fennec", was first released for Maemo in January 2010 with version 1.0[207] and for Android in March 2011 with version 4.0.[208] Support for Maemo was discontinued after version 7, released in September 2011.[209] 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.[210] At the end of its existence, it had a market share of 0.5% on Android.[211]

In August 2020, Mozilla launched a new version of its Firefox for Android app, named Firefox Daylight to the public[212] and codenamed Fenix,[213] after a little over a year of testing.[214] 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.[215] It also added the ability to place the address bar on the bottom, and a new Collections feature.[212] However, it was criticized for only having nine Add-ons at launch, and missing certain features.[216][217][218] In response, Mozilla stated that they will allow more Add-ons with time.[219]

Firefox on MeeGo OS

Firefox on Firefox OS

Firefox 136 on Android

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Operating system | Latest stable version  | Support status

|
|

Android
(including Android-x86)  | 5.0 and later  | Latest version: 141.0.1 (x64)[220] [221] | 2018–
Latest version: 141.0.1 (ARM64)[220] [221] | 2017–
Latest version: 141.0.1 (IA-32)[220] [221] | 2014–
Latest version: 141.0.1 (ARMv7)[220] [221]
4.1–4.4 | Unsupported: 68.11.0 (x64)[222] | 2018–2020
Unsupported: 68.11.0 (IA-32) | 2013–2020
Unsupported: 68.11.0 (ARMv7) | 2012–2020
4.0 | Unsupported: 55.0.2 (IA-32)[223][224] | 2013–2017
Unsupported: 55.0.2 (ARMv7) | 2011–2017
3.0–3.2 | Unsupported: 45.0.2 (ARMv7)[223] | 2011–2016
2.3 | Unsupported: 47.0 (ARMv7)[223][225]
2.2–4.3 | Unsupported: 31.3.0esr (ARMv6) | 2012–2015
2.2 | Unsupported: 31.0 (ARMv7)[226] | 2011–2014
2.1 | Unsupported: 19.0.2 (ARMv6) | 2012–2013
Unsupported: 19.0.2 (ARMv7) | 2011–2013
2.0 | Unsupported: 6.0.2 (ARMv7) | 2011
Firefox OS | 2.2  | Unsupported: 35/36/37 | 2015
2.1  | Unsupported: 33/34 | 2014–2015
2.0  | Unsupported: 31/32
1.4  | Unsupported: 30 | 2014
1.3  | Unsupported: 28
1.2  | Unsupported: 26 | 2013
1.1  | Unsupported: 18
Maemo | Unsupported: 7.0.1 | 2010–2011
Windows Mobile | 6.x  | Unsupported: 1.0a3 | N/A

Legend:

Unsupported

Supported

Latest version

Preview version

Future version

Notes

* Firefox for iOS is not listed in this table as its version numbers would be misleading. Prior to version 96,[227] it used version numbers distinct from other Firefox versions, which share the core Gecko rendering engine. The iOS app uses the operating system's rendering engine (WebKit), rather than Mozilla's (Gecko).

### Firefox for iOS

[edit]

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.[228][229] 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.[230]

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.[231] Apple later opened their "Nitro" JavaScript engine to third-party browsers.[232] 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.[233][234][235] It was fully released in November later that year.[236] 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.[237][238] 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.[239]

### Firefox Reality (AR/VR)

[edit]

Firefox Reality was released for augmented reality and virtual reality headsets in September 2018.[240] 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.[241]

### Third-party ports

[edit]

Firefox has also been ported to FreeBSD,[242] NetBSD,[243] OpenBSD,[244] OpenIndiana,[245] OS/2,[246] ArcaOS,[247] SkyOS, RISC OS[248] and BeOS/Haiku,[249][250][251][252] and an unofficial rebranded version called Timberwolf has been available for AmigaOS 4.[253]

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.[254]

The Solaris 10 port of Firefox (including OpenSolaris) was maintained by the Oracle Solaris Desktop Beijing Team,[255][256] until March 2018 when the team was disbanded. There was also an unofficial port of Firefox 3.6.x to IBM AIX[257][258] and of v1.7.x to UnixWare.[259]

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Operating system | Latest stable version  | Support status

|
|

Solaris | 11  | Supported: 128.12.0esr (x64, SPARC V9) | 2011–
10 and OpenSolaris  | Unsupported: 52.9.0esr (IA-32, x64, SPARC V9) | 2005–2018
8–9  | Unsupported: 2.0.0.20 (IA-32, SPARC V9) | 2004–2008
AIX | 7.1 and 7.2  | Unsupported: 3.6.25 (POWER) | N/A
HP-UX | 11i v2–v3  | Unsupported: 3.5.9 (IA-64, PA-RISC) | N/A
FreeBSD (Tier 1)  | 13 and later  | Latest version: 141.0 (x64, ARM64) | 2021–
Supported: 140.1.0esr (x64, ARM64)
12  | Unsupported: 121.0 (IA-32) | 2018–2024
Unsupported: 115.6.0esr (IA-32)
OpenBSD -stable  | 7.7  | Latest version: 141.0 (x64, ARM64, RISC-V) | 2025–
Supported: 128.13.0esr (x64, ARM64, RISC-V)
6.9  | Unsupported: 88.0.1 (IA-32) | 2021
Unsupported: 78.14.0esr (IA-32)
5.8  | Unsupported: 38.7.1esr (PPC) | 2015–2016
5.7  | Unsupported: 31.6.0esr (SPARC V9) | 2015
MeeGo/Harmattan | Unsupported: 15 (ARMv7) | 2011–2012

Legend:

Unsupported

Supported

Latest version

Preview version

Future version

## Channels and release schedule

[edit]

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.[260][261] This plan was implemented in April 2011.[262] 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.[263][260][264] 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.[265][266]

In 2017, Mozilla abandoned the Aurora channel, which saw low uptake, and rebased Firefox Developer Edition onto the beta channel.[267] Mozilla uses A/B testing[268] 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.[263] In 2020, Firefox moved to a four-week release cycle, to catch up with Chrome in support for new web features.[269][270] Chrome switched to a four-week cycle a year later.[271]

## Licensing

[edit]

Firefox source code is free software, with most of it being released under the Mozilla Public License (MPL) version 2.0.[12] 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,[272] the customizable Pale Moon, and the privacy focused Tor Browser.[273]

In the past, Firefox was licensed solely under the MPL, then version 1.1,[274] 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.[275][276] 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.[274] However, on January 3, 2012, Mozilla released the GPL-compatible MPL 2.0,[277] and with the release of Firefox 13 on June 5, 2012, Mozilla used it to replace the tri-licensing scheme.[278]

## Trademark and logo

[edit]

See also: Debian–Mozilla trademark dispute

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.[279] The name "Firefox" derives from a nickname of the red panda.[36] Mozilla celebrated Red Pandas.[280]

Mozilla has placed the Firefox logo files under open-source licenses,[281][282] but its trademark guidelines do not allow displaying altered[283] or similar logos[284] in contexts where trademark law applies.[285]

Logo used for Iceweasel

There has been some controversy over the Mozilla Foundation's intentions in stopping certain open-source distributions from using the "Firefox" trademark.[13] Open-source browsers "enable greater choice and innovation in the market rather than aiming for mass-market domination."[286] 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".[287]

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.[citation needed]

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.[288] 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.[289]

### Branding and visual identity

[edit]

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.[290] For this reason, software distributors who distribute modified versions of Firefox do not use the icon.[285]

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.[291]

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.[292][293] The logo was later revised and updated, fixing several flaws found when it was enlarged.[294] 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.[293]

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.

* Logo history
* Logo of "Phoenix" and "Firebird" before being renamed as Firefox

* Firefox 0.8–0.10, from February 9, 2004 to November 8, 2004

* Firefox 1.0–3.0, from November 9, 2004 to June 29, 2009

* Firefox 3.5–22, from June 30, 2009 to August 5, 2013

* Firefox 23–56, from August 6, 2013 to November 13, 2017[295]

* Firefox 57–69, from November 14, 2017 to October 21, 2019

* Firefox 70 or later, since October 22, 2019

* Other logos, used for nightly versions
* The 2011 Nightly logo, used to represent nightly builds of pre-alpha versions

* The 2013 Nightly logo

* The 2017 Nightly logo

* The 2019 Nightly logo

* Other logos, used for developer/aurora versions
* The 2011 Aurora logo, used to represent an alpha release

* The 2013 Aurora logo

* The 2015 Developer Edition logo

* The 2017 Developer Edition logo

* The 2019 Developer Edition logo

* Other logos
* Blue globe artwork, distributed with the source code, and is explicitly not protected as a trademark[296]

* The logo for the Firefox brand of products and services, as of July 2019. It appears as if the fox was removed, but this is not the logo for the browser itself.

## Promotion

[edit]

Firefox mascot at the FISL 16 (2015), Brazil

Firefox was adopted rapidly, with 100 million downloads in its first year of availability.[297] 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".[298]

Firefox continued to heavily market itself by releasing a marketing portal dubbed "Spread Firefox" (SFX) on September 12, 2004.[299] 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."[286] 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.[300] 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.[301] This resulted in an official certified Guinness world record, with over eight million downloads.[302] 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."[303]

In celebration of the third anniversary of the founding of the Mozilla Foundation, the "World Firefox Day" campaign was established on July 15, 2006,[304][305] and ran until September 15, 2006.[306] 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.[307] After Firefox reached 500 million downloads on February 21, 2008, the Firefox community celebrated by visiting Freerice to earn 500 million grains of rice.[308]

Other initiatives included Live Chat – a service Mozilla launched in 2007 that allowed users to seek technical support from volunteers.[309] The service was later retired.[310]

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.[311]

## Performance

[edit]

### 2000s

[edit]

In December 2005, Internet Week ran an article in which many readers reported high memory usage in Firefox 1.5.[312] 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.[313] Other known causes of memory problems were malfunctioning extensions such as Google Toolbar and some older versions of AdBlock,[314] or plug-ins, such as older versions of Adobe Acrobat Reader.[315] 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.[316]

In 2006, Softpedia noted that Firefox 1.5 took longer to start up than other browsers,[317] which was confirmed by further speed tests.[318]

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.[319] A Windows Vista feature called SuperFetch performs a similar task of preloading Firefox if it is used often enough.[citation needed]

Tests performed by PC World and Zimbra in 2006 indicated that Firefox 2 used less memory than Internet Explorer 7.[320][321] 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.[322][323][324] In mid-2009, BetaNews benchmarked Firefox 3.5 and declared that it performed "nearly ten times better on XP than Microsoft Internet Explorer 7".[325]

### 2010s

[edit]

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.[326]

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. With 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. For the final category, conformance, it was determined that Firefox had "strong" conformance for JavaScript and HTML5. So in conclusion, Tom's Hardware determined that Firefox was the best browser for Windows 7 OS, but that it only narrowly beat Google Chrome.[327]

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.[328]

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.[329]

In benchmark testing in early 2015 on a "high-end" Windows machine, comparing Microsoft Edge [Legacy], 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.[330]

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 [Legacy]. Edge [Legacy] took overall first place on the Jetstream and Octane benchmarks.[331]

### 2020s

[edit]

In 2023 Microsoft published that it corrected a mistake in MS Windows after 5 years that slowed down especially Firefox.[332]

### Firefox Quantum

[edit]

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.[333][334] TechRadar rated it as the fastest web browser in a May 2019 report.[335]

## Usage share

[edit]

Further information: Usage share of web browsers

Usage share of web browsers according to StatCounter
Market share overview
According to StatCounter data
July 2025[336]

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| Browser  | % of Fx | % of total

|
|

Firefox 1 | — | —
Firefox 2 | — | —
Firefox 3 | — | —
Firefox 4 | — | —
Firefox 5–9 | — | —
Firefox 10–16 | 2.04% | 0.05%
Firefox 17–23 | — | —
Firefox 24–30 | — | —
Firefox 31–37 | — | —
Firefox 38–44 | — | —
Firefox 45–51 | — | —
Firefox 52–59 | 1.22% | 0.03%
Firefox 60–67 | — | —
Firefox 68–77 | 1.22% | 0.03%
Firefox 78–90 | — | —
Firefox 91–101 | — | —
Firefox 102–114 | — | —
Firefox 115 and 115 ESR | 7.35% | 0.18%
Firefox 116 | — | —
Firefox 117 | — | —
Firefox 118 | 4.90% | 0.12%
Firefox 119 | — | —
Firefox 120 | — | —
Firefox 121 | — | —
Firefox 122 | — | —
Firefox 123 | — | —
Firefox 124 | — | —
Firefox 125 | — | —
Firefox 126 | 0.41% | 0.01%
Firefox 127 | — | —
Firefox 128 and 128 ESR | 4.49% | 0.11%
Firefox 129 | — | —
Firefox 130 | — | —
Firefox 131 | — | —
Firefox 132 | — | —
Firefox 133 | 0.41% | 0.01%
Firefox 134 | 0.41% | 0.01%
Firefox 135 | 0.41% | 0.01%
Firefox 136 | 0.82% | 0.02%
Firefox 137 | 0.82% | 0.02%
Firefox 138 | 0.82% | 0.02%
Firefox 139 | 3.27% | 0.08%
Firefox 140 and 140 ESR | 48.98% | 1.20%
Firefox 141 | 14.69% | 0.36%
Firefox 142 | — | —
All variants[337] | 100% | 2.45%

Downloads have continued at an increasing rate since Firefox 1.0 was released, and as of 31 July 2009[update] Firefox had already been downloaded over one billion times.[338] This number does not include downloads using software updates or those from third-party websites.[339] 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.[citation needed]

In July 2010, IBM asked all employees (about 400,000) to use Firefox as their default browser.[340]

Firefox was the second-most used web browser until November 2011, when Google Chrome surpassed it.[341] According to Mozilla, Firefox had more than 450 million users as of October 2012[update].[342][343]

In October 2024, Firefox was the fourth-most widely used desktop browser, and it was the fourth-most popular with 2.95% of worldwide usage share of web browsers across all platforms.[344]

| Desktop/laptop browser statistics

* v
* t
* e

|  |
Google Chrome |

| 69.68%
Microsoft Edge |

| 11.80%
Safari |

| 6.51%
Mozilla Firefox |

| 5.32%
Opera |

| 2.20%
Other |

| 4.48%
Desktop web browser market share according to StatCounter for July 2025.[345]

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.[346] From October 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 October 2020 to 9.32% in September 2021.

In Cuba, it dropped from 54.36% in Sept 2020 to 38.42% in September 2021.[347][348]

The UK[349] and US[350] 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%.[351]

## See also

[edit]

* Internet portal
* Linux portal
* Free and open-source software portal

* Firefox User Extension Library
* History of the web browser
* List of free and open-source software packages
* Mozilla Prism
* XULRunner
* Mozilla Thunderbird

## References

[edit]

1. ^ a b c d e f g h "Firefox 141.0, See All New Features, Updates and Fixes". July 22, 2025. Retrieved July 22, 2025.
2. ^ a b c d e f g h "Firefox ESR 140.1.0, See All New Features, Updates and Fixes". July 22, 2025. Retrieved July 22, 2025.
3. ^ "Firefox ESR 128.13.0, See All New Features, Updates and Fixes". mozilla.org. July 22, 2025. Retrieved July 22, 2025.
4. ^ "Firefox ESR 115.26.0, See All New Features, Updates and Fixes". mozilla.org. July 22, 2025. Retrieved July 22, 2025.
5. ^ "Index of /pub/firefox/releases/142.0b5/". July 30, 2025. Retrieved July 31, 2025.
6. ^ "Firefox Nightly 143.0a1, See All New Features, Updates and Fixes". July 21, 2025. Retrieved July 21, 2025.
7. ^ Yegulalp, Serdar (February 3, 2017). "Mozilla binds Firefox's fate to the Rust language". InfoWorld. Archived from the original on August 19, 2017. Retrieved August 19, 2017.
8. ^ "The Mozilla Firefox Open Source Project on Open Hub: Languages Page". openhub.net. Archived from the original on October 7, 2021. Retrieved October 15, 2021.
9. ^ a b "Firefox for Android upgrade FAQs". Archived from the original on August 12, 2020. Retrieved August 16, 2020.
10. ^ a b "Mozilla Firefox release files". Mozilla. Archived from the original on October 9, 2019. Retrieved October 1, 2020.
11. ^ "Mozilla". Archived from the original on October 21, 2014. Retrieved October 20, 2014.
12. ^ a b Mozilla Licensing Policies, mozilla.org, archived from the original on April 2, 2013, retrieved January 5, 2012
13. ^ a b Corbet, Jonathan (January 10, 2005). "Debian and Mozilla – a study in trademarks". LWN.net. Archived from the original on August 1, 2017. Retrieved September 14, 2011.
14. ^ "Gecko Layout Engine". download-firefox.org. July 17, 2008. Archived from the original on June 15, 2010. Retrieved May 10, 2012.
15. ^ "FreeBSD ports". Archived from the original on March 23, 2019. Retrieved March 24, 2018.
16. ^ "OpenBSD ports". Archived from the original on January 20, 2019. Retrieved March 24, 2018.
17. ^ "NetBSD pkgsrc". Archived from the original on November 1, 2018. Retrieved October 31, 2018.
18. ^ "Firefox for Fire TV". Amazon. Archived from the original on July 7, 2020. Retrieved July 17, 2020.
19. ^ Jay, Paul (February 28, 2008). "Curtains for Netscape – Tech Bytes". CBC News. Archived from the original on July 5, 2015. Retrieved June 26, 2015.
20. ^ "Firefox browser takes on Microsoft". BBC News. November 9, 2004. Archived from the original on December 20, 2017.
21. ^ Weber, Tim (May 9, 2005). "The assault on software giant Microsoft". BBC News. Archived from the original on September 25, 2017.
22. ^ Mayo, Mark (November 14, 2017). "Introducing the New Firefox: Firefox Quantum". The Mozilla Blog. Archived from the original on June 27, 2018. Retrieved May 26, 2018.
23. ^ a b StatCounter. "Desktop Browser Market Share Worldwide (Jan 2009 – Jan 2013)". gs.statcounter.com. Archived from the original on October 11, 2017. Retrieved October 23, 2021.
24. ^ "StatCounter Global Stats – Browser, OS, Search Engine including Mobile Usage Share". StatCounter Global Stats. Archived from the original on May 26, 2012. Retrieved July 14, 2018.
25. ^ "StatCounter global stats – Top 12 browser versions". StatCounter. Archived from the original on May 26, 2012. Retrieved March 12, 2010.
26. ^ "Desktop Browser Market Share Worldwide". StatCounter Global Stats. Retrieved March 5, 2025.
27. ^ 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.
28. ^ Yeow, Cheah Chu (2005). Firefox Secrets. SitePoint Pty Ltd. ISBN 978-0-9752402-4-3. Archived from the original on March 23, 2019. Retrieved December 12, 2015.
29. ^ Gilbertson, Scott (September 24, 2012). "Happy Birthday, Firefox: The Little Web Browser That Could Turns 10". Wired. Archived from the original on August 5, 2017. Retrieved September 20, 2019.
30. ^ Eich, Brendan; Hyatt, David (April 2, 2003). "mozilla development roadmap". Mozilla. Archived from the original on April 10, 2009. Retrieved August 2, 2009.
31. ^ See:
* "Phoenix 0.1 (Pescadero) release Notes and FAQ". mozilla.org. May 28, 2003. Archived from the original on May 28, 2003. Retrieved February 26, 2018.
* "Phoenix 0.2 (Santa Cruz) release Notes and FAQ". mozilla.org. December 3, 2003. Archived from the original on December 3, 2003. Retrieved February 26, 2018.
* "Phoenix 0.3 (Lucia) release Notes and FAQ". mozilla.org. December 3, 2003. Archived from the original on December 3, 2003. Retrieved February 26, 2018.
* "Phoenix 0.4 (Oceano) Release Notes and FAQ". mozilla.org. December 3, 2003. Archived from the original on December 3, 2003. Retrieved February 26, 2018.
* "Phoenix 0.5 (Naples) Release Notes and FAQ". mozilla.org. December 3, 2003. Archived from the original on December 3, 2003. Retrieved February 26, 2018.
* "Mozilla Firebird 0.6 Release Notes and FAQ". mozilla.org. December 3, 2003. Archived from the original on December 3, 2003. Retrieved February 26, 2018.
* "Mozilla Firebird 0.6.1 Release Notes and FAQ". mozilla.org. December 3, 2003. Archived from the original on December 3, 2003. Retrieved February 26, 2018.
* "Mozilla Firebird 0.7 Release Notes". mozilla.org. October 28, 2003. Archived from the original on October 28, 2003. Retrieved February 26, 2018.
32. ^ "Mozilla browser becomes Firebird". IBPhoenix. Archived from the original on September 14, 2007. Retrieved January 30, 2007.
33. ^ Festa, Paul (May 7, 2003). "Mozilla's Firebird gets wings clipped". CNET. Archived from the original on June 29, 2018. Retrieved January 30, 2007.
34. ^ Festa, Paul (February 9, 2004). "Mozilla holds 'fire' in naming fight". CNET. Archived from the original on June 29, 2018. Retrieved January 24, 2007.
35. ^ "Red panda". BBC Nature. Archived from the original on January 11, 2014. Retrieved August 20, 2014.
36. ^ a b Garrity, Steven; Markham, Gervase; Goodger, Ben; Decrem, Bart; et al. "Firefox name FAQ". mozilla.org. Archived from the original on February 28, 2012. Retrieved March 13, 2012.
37. ^ "Firefox 1.5 Release Notes". mozilla.org archive. November 29, 2005. Archived from the original on November 18, 2014. Retrieved November 17, 2014.
38. ^ "Better Browser Now the Best". Forbes. September 29, 2004. Archived from the original on May 3, 2019. Retrieved May 20, 2020.
39. ^ Mossberg, Walter S. (September 17, 2004). "How to Protect Yourself From Vandals, Viruses If You Use Windows". Personal Technology from The Wall Street Journal. Archived from the original on September 17, 2004.
40. ^ "History of the Mozilla Project". Mozilla. Retrieved December 3, 2024.
41. ^ Lake, Matt (August 11, 2004). "Microsoft Windows XP SP2 review: Microsoft Windows XP SP2". CNET. Archived from the original on February 11, 2021. Retrieved September 20, 2021.
42. ^ "Firefox 1.0 Release Notes". mozilla.org archive. November 9, 2004. Archived from the original on June 27, 2018. Retrieved June 26, 2018.
43. ^ "Mozilla Firefox Release Notes". Mozilla. Archived from the original on September 17, 2021. Retrieved September 20, 2021.
44. ^ Shankland, Stephen (August 4, 2017). "Inside Mozilla: Firefox fights back". CNET. Archived from the original on August 3, 2017. Retrieved October 9, 2017.
45. ^ Dignan, Larry (August 6, 2017). "Why you should root for Mozilla's Firefox 57 in the browser wars". ZDNet. Archived from the original on December 11, 2017. Retrieved October 9, 2017.
46. ^ Keizer, Gregg (November 14, 2017). "Mozilla seeks return to glory with release of Firefox Quantum". Computerworld. International Data Group. Archived from the original on December 23, 2017. Retrieved December 11, 2017.
47. ^ Hoffman, Chris (November 14, 2017). "What's New in Firefox Quantum, the Firefox You've Been Waiting For". How-To Geek. Archived from the original on October 28, 2021. Retrieved October 29, 2021.
48. ^ "Firefox's performance settings | Firefox Help". support.mozilla.org. Archived from the original on October 29, 2021. Retrieved October 29, 2021. (`about:config` property: `dom.ipc.processCount.web`)
49. ^ a b Needham, Kev (May 4, 2019). "Update Regarding Add-ons in Firefox". Mozilla. Archived from the original on May 4, 2019. Retrieved May 4, 2019.
50. ^ a b Brinkmann, Martin (May 4, 2019). "Your Firefox extensions are all disabled? That's a bug!". GHacks. Archived from the original on May 4, 2019. Retrieved May 4, 2019.
51. ^ "End of support for Adobe Flash | Firefox Help". support.mozilla.org. Archived from the original on February 19, 2022. Retrieved January 2, 2024.
52. ^ "Firefox 89.0, See All New Features, Updates and Fixes". Mozilla. Archived from the original on June 7, 2021. Retrieved April 20, 2024.
53. ^ "Firefox Beta 89.0beta, See All New Features, Updates and Fixes". Mozilla. Retrieved April 20, 2024.
54. ^ "So. Now we can not even turn off proton?". Mozilla Discourse. July 14, 2021. Archived from the original on April 20, 2024. Retrieved April 20, 2024.
55. ^ "What's the status of post-Proton accessibility?". connect.mozilla.org. June 3, 2022. Archived from the original on April 20, 2024. Retrieved April 20, 2024.
56. ^ "Bring back menu icons". connect.mozilla.org. March 1, 2022. Retrieved April 20, 2024.
57. ^ Baxter, Daryl (June 6, 2021). "Can Firefox's new look save the web browser?". TechRadar.
58. ^ "1704131 – Hard to differentiate between active (foreground) and inactive (background) windows". bugzilla.mozilla.org. Archived from the original on April 20, 2024. Retrieved October 27, 2024.
59. ^ "Firefox is suddenly failing to load websites this morning, here's the fix". 9To5Mac. January 13, 2021. Archived from the original on January 13, 2022. Retrieved January 13, 2021.
60. ^ "Firefox 118.0, See All New Features, Updates and Fixes". Mozilla. September 26, 2023. Archived from the original on November 8, 2023. Retrieved February 29, 2024.
61. ^ "Firefox 122.0, See All New Features, Updates and Fixes". Mozilla. January 23, 2024. Archived from the original on January 27, 2024. Retrieved January 27, 2024.
62. ^ "Firefox Tip – Drag Bookmarks to your Toolbar". The Den. Mozilla. July 20, 2012. Archived from the original on October 29, 2021. Retrieved October 29, 2021.
63. ^ Brinkmann, Martin (December 28, 2007). "Speed up the Download Process in Firefox with drag and drop? – gHacks Tech News". gHacks Technology News. Archived from the original on October 29, 2021. Retrieved October 29, 2021.
64. ^ "Profile Manager – Create, remove or switch Firefox profiles | Firefox Help". support.mozilla.org. Archived from the original on October 29, 2021. Retrieved October 29, 2021.
65. ^ "Export Firefox bookmarks to an HTML file to back up or transfer bookmarks | Firefox Help". support.mozilla.org. Archived from the original on August 12, 2021. Retrieved August 13, 2021.
66. ^ Kaufman, Lori (July 27, 2016). "How to Enable Offline Browsing in Firefox". How-To Geek. Archived from the original on August 31, 2021. Retrieved August 31, 2021.
67. ^ "Firefox Page Info window – Firefox Help". Archived from the original on September 24, 2021. Retrieved September 24, 2021.
68. ^ "Location-Aware Browsing". Mozilla Foundation. Archived from the original on February 15, 2023. Retrieved July 5, 2009. (section "What information is being sent, and to whom? (...)")
69. ^ Lardinois, Frederic (November 14, 2017). "Mozilla terminates its deal with Yahoo and makes Google the default in Firefox again". TechCrunch. Archived from the original on November 14, 2017. Retrieved November 14, 2017.
70. ^ Thurrott, Paul (October 9, 2021). "Is Mozilla Firefox getting sketchy?". Thurrott.com. Archived from the original on August 25, 2022. Retrieved August 25, 2022.
71. ^ Porter, Jon (February 25, 2020). "Firefox turns controversial encryption on by default in the US". The Verge. Archived from the original on August 25, 2022. Retrieved August 25, 2022.
72. ^ Parrish, Kevin (August 5, 2016). "Hang up the phone: Mozilla to pull the plug on Firefox Hello in September". Digital Trends. Archived from the original on January 15, 2017.
73. ^ "Firefox 72.0, See All New Features, Updates and Fixes". Mozilla. January 7, 2020. Archived from the original on January 7, 2020. Retrieved October 20, 2021. "Support for blocking images from individual domains has been removed from Firefox, because of low usage and poor user experience."
74. ^ "Firefox 45 Will Remove Tab Groups Today, Get This Add-on To Replace It". news.slashdot.org. March 8, 2016. Archived from the original on August 12, 2021. Retrieved August 12, 2021.
75. ^ "How to Add Extra Bookmarks Toolbars in Firefox". Guiding Tech. June 1, 2010. Archived from the original on August 12, 2021. Retrieved August 12, 2021.
76. ^ "3D view – Firefox Developer Tools | MDN". developer.mozilla.org. Archived from the original on September 26, 2021. Retrieved September 26, 2021. "From Firefox 47 onwards, 3D view is no longer available."
77. ^ "Browser Extensions". MDN Web Docs. Archived from the original on July 19, 2020. Retrieved July 16, 2020.
78. ^ Villalobos, Jorge (August 10, 2017). "Upcoming Changes in Compatibility Features". Mozilla Add-ons Blog. Archived from the original on December 26, 2017. Retrieved December 11, 2017.
79. ^ Bright, Peter (August 21, 2015). "Mozilla sets plan to dump Firefox add-ons, move to Chrome-like extensions". Ars Technica. Archived from the original on December 1, 2017. Retrieved December 11, 2017.
80. ^ Brandom, Russell (December 16, 2017). "Mozilla faces blowback after slipping Mr Robot plugin into Firefox". The Verge. Archived from the original on August 25, 2022. Retrieved August 25, 2022.
81. ^ Nichols, Shaun (December 18, 2017). "Mozilla's creepy Mr Robot stunt in Firefox flops in touching tribute to TV show's 2nd season". The Register. Archived from the original on August 25, 2022. Retrieved August 25, 2022.
82. ^ "Mozilla sets plan to dump Firefox add-ons, move to Chrome-like extensions". Ars Technica. August 21, 2015. Archived from the original on August 22, 2015. Retrieved August 22, 2015.
83. ^ "Social & Communication: Add-ons for Firefox". addons.mozilla.org. Archived from the original on December 3, 2015. Retrieved November 16, 2015.
84. ^ "Share Your Firefox with Friends & Family While Keeping Your Web Information Private with Guest Browsing". The Mozilla Blog. October 29, 2013. Archived from the original on January 27, 2021. Retrieved January 27, 2021.
85. ^ "Share your Android device with a Firefox Guest Session | Firefox for Android (ESR) Help". support.mozilla.org. Archived from the original on January 27, 2021. Retrieved January 27, 2021.
86. ^ ""SVG" | Can I use... Support tables for HTML5, CSS3, etc". caniuse.com. Archived from the original on December 7, 2023. Retrieved December 13, 2021.
87. ^ "SVG 2 support in Mozilla". MDN Web Docs. Archived from the original on September 20, 2016. Retrieved July 13, 2016.
88. ^ "SVG in Firefox". Archived from the original on August 29, 2008. Retrieved September 30, 2007.
89. ^ "CSS Reference: Mozilla Extensions – MDC". Developer.mozilla.org. April 24, 2011. Archived from the original on August 24, 2011. Retrieved August 17, 2011.
90. ^ "Which open standards is the Gecko development project working to support, and to what extent does it support them?". Gecko FAQ. Mozilla Developer Network. January 21, 2007. Archived from the original on September 13, 2008. Retrieved January 24, 2007.
91. ^ "WHATWG specification – Web Applications 1.0 – Working Draft. Client-side session and persistent storage". Web Hypertext Application Technology Working Group. February 7, 2007. Archived from the original on August 1, 2012. Retrieved February 7, 2007.
92. ^ "DOM:Storage". Mozilla Developer Network. September 30, 2007. Archived from the original on September 1, 2008. Retrieved February 7, 2007.
93. ^ Dumbill, Edd (December 6, 2005). "The future of HTML, Part 1: WHATWG". IBM. Archived from the original on October 11, 2007. Retrieved January 24, 2007.
94. ^ Fulton, Scott M. (December 20, 2007). "Latest Firefox beta passes Acid2 test, IE8 claims to pass also". BetaNews. Archived from the original on June 28, 2018. Retrieved December 21, 2007.
95. ^ Bailey, Daniel. "Why Firefox 4 Will Never Pass The Acid3 Test". Archived from the original on February 3, 2011. Retrieved February 1, 2011.
96. ^ Hickson, Ian (September 17, 2011). "Acid3 2011 Update". Archived from the original on October 12, 2011. Retrieved September 17, 2011.
97. ^ Perry, Douglas (September 20, 2011). "Acid3 Test Simplified; All Modern Browsers Score 100". Tom's Guide. Purch Group. Archived from the original on June 28, 2018. Retrieved July 6, 2018.
98. ^ "Phishing and Malware Protection". Mozilla Corp. How does Phishing and Malware Protection work in Firefox?. Archived from the original on August 13, 2021. Retrieved November 29, 2009.
99. ^ "Client specification for the Google Safe Browsing v2.1 protocol". Google Inc. Archived from the original on February 11, 2010. 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. [...]"
100. ^ "Firefox 47.0, See All New Features, Updates and Fixes". Mozilla. Archived from the original on July 19, 2016. Retrieved July 13, 2016.
101. ^ "Watch DRM content on Firefox | Firefox Help". support.mozilla.org. Archived from the original on September 7, 2015. Retrieved July 13, 2016.
102. ^ "Mozilla To Test Widevine CDM in Firefox Nightly". April 8, 2016. Archived from the original on June 7, 2016. Retrieved July 13, 2016.
103. ^ Kirk, Jeremy (May 15, 2014). "Mozilla hates it, but streaming video DRM is coming to Firefox". PC World. Archived from the original on May 15, 2018. Retrieved July 6, 2018.
104. ^ Paul, Ian (May 13, 2015). "Firefox 38 arrives with contentious closed-source DRM integrated by default". PC World. Archived from the original on August 2, 2015. Retrieved August 12, 2015.
105. ^ Chesters, James (May 20, 2014). "Mixed reactions greet Mozilla plans to add HTML5 DRM in Firefox". InfoQ. Archived from the original on May 7, 2019. Retrieved May 6, 2019.
106. ^ Captain, Sean (August 11, 2019). "Firefox at 15: its rise, fall, and privacy-first renaissance". Fast Company. Archived from the original on May 7, 2020. Retrieved June 6, 2024.
107. ^ 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."
108. ^ Costa, Dan (March 24, 2005). Vamosi, Scott (ed.). "Mozilla Firefox Browser [sic] review". CNET. Archived from the original on December 26, 2007.
109. ^ Krebs, Brian (January 4, 2007). "Internet Explorer Unsafe for 284 Days in 2006". The Washington Post. Archived from the original on April 24, 2011. Retrieved January 24, 2007.
110. ^ 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.
111. ^ "The Security Architecture of the Chromium Browser". seclab.stanford.edu. Archived from the original on June 6, 2024. Retrieved June 6, 2024.
112. ^ "Technical Overview of Multiprocess Firefox". Mozilla Developer Network. November 26, 2020. Archived from the original on November 26, 2020. Retrieved June 6, 2024.
113. ^ a b Callahan, Dan (April 11, 2016). "The 'Why' of Electrolysis". Mozilla Add-ons Community Blog. Archived from the original on June 6, 2024. Retrieved June 6, 2024.
114. ^ Bright, Peter (December 21, 2016). "Firefox takes the next step toward rolling out multi-process to everyone". Ars Technica. Archived from the original on December 24, 2016. Retrieved December 25, 2016.
115. ^ Anderson, Tim. "Mozilla will emit 'first version' of Servo-based Rust browser in June". www.theregister.com. Archived from the original on June 7, 2024. Retrieved June 7, 2024.
116. ^ "Fearless Concurrency in Firefox Quantum | Rust Blog". blog.rust-lang.org. Archived from the original on June 7, 2024. Retrieved June 7, 2024.
117. ^ "Entering the Quantum Era—How Firefox got fast again and where it's going to get faster". Mozilla Hacks – the Web developer blog. Retrieved June 7, 2024.
118. ^ Ellis, Cat (November 14, 2017). "Firefox Quantum is here, and it wants to win you back". TechRadar. Retrieved June 7, 2024.
119. ^ "Firefox will get overhaul in bid to get you interested again". CNET. Archived from the original on July 14, 2022. Retrieved June 7, 2024.
120. ^ Proven, Liam. "Rusty revenant Servo returns to render once more". www.theregister.com. Archived from the original on June 7, 2024. Retrieved June 7, 2024.
121. ^ "The Same Origin Policy". Mozilla Developer Network. June 8, 2001. Archived from the original on October 14, 2008. Retrieved November 12, 2007.
122. ^ "Privacy & Security Preferences – SSL". Mozilla. August 31, 2001. Archived from the original on February 7, 2007. Retrieved January 24, 2007.
123. ^ "HTTPS-Only Mode in Firefox". Mozilla. February 18, 2025.
124. ^ B, Rahul (February 26, 2021). "Why You Should Use Firefox: 7 Reasons – BrowserMentor". Archived from the original on August 13, 2021. Retrieved February 26, 2021.
125. ^ Murphy, David (February 24, 2013). "Firefox 22 to Disable Third-Party Cookies by Default". PC Magazine. Archived from the original on September 26, 2013. Retrieved September 21, 2013.
126. ^ Keizer, Gregg (June 20, 2013). "Mozilla again postpones Firefox third-party cookie-blocking, this time for months". Computerworld. Archived from the original on September 26, 2013. Retrieved September 21, 2013.
127. ^ "Firefox 23 Release Notes". Mozilla.org. August 6, 2013. Archived from the original on March 28, 2014. Retrieved March 14, 2014.
128. ^ Bright, Peter (August 6, 2013). "Firefox 23 lands with a new logo and mixed content blocking". Ars Technica. Archived from the original on February 18, 2014. Retrieved March 14, 2014.
129. ^ Anthony, Sebastian (August 7, 2013). "Firefox 23 finally kills the blink tag, removes ability to turn off JavaScript, introduces new logo". ExtremeTech. Archived from the original on March 29, 2014. Retrieved March 14, 2014.
130. ^ "Addons/Extension Signing". Mozilla wiki. Archived from the original on October 10, 2019. Retrieved November 23, 2019.
131. ^ Villalobos, Jorge (February 10, 2015). "Introducing Extension Signing: A Safer Add-on Experience". Mozilla Add-ons Blog. Archived from the original on October 29, 2019. Retrieved November 23, 2019.
132. ^ Song, Victoria (May 6, 2019). "Firefox fixes borked extensions for everyone but legacy users". Gizmodo. Archived from the original on May 6, 2019. Retrieved May 6, 2019.
133. ^ "Private Auskunft – DNS mit Privacy und Security vor dem Durchbruch". C't (in German). 2018 (14): 176–179\. June 22, 2018. Archived from the original on November 12, 2020. Retrieved July 25, 2018.
134. ^ "About Encrypted DNS by Carsten Strotmann & Jürgen Schmidt". C't (in German). 2018 (14): 176–179\. June 22, 2018. Archived from the original on November 12, 2020. Retrieved July 25, 2018. "This is the English Translation of Previous Citation."
135. ^ "Cloudflare Resolver for Firefox". cloudflare.com. Archived from the original on July 22, 2018. Retrieved July 25, 2018.
136. ^ Wood, Marissa. "Latest Firefox Release is Faster than Ever". The Mozilla Blog. Archived from the original on May 21, 2019. Retrieved May 22, 2019.
137. ^ "What is Firefox SmartBlock? Mozilla's 'best of both worlds' browsing explained". Trusted Reviews. March 25, 2021. Archived from the original on March 25, 2021. Retrieved March 30, 2021.
138. ^ "Firefox Now Blocks Cross-Site Cookie Tracking Everywhere". How To Geek. June 14, 2022. Archived from the original on June 14, 2022. Retrieved May 15, 2022.
139. ^ Parrack, Dave (February 28, 2025). "Firefox's Updated Terms of Use Are Not As Bad As They Sound". MakeUseOf. Retrieved March 1, 2025.
140. ^ Peters, Jay (February 28, 2025). "Mozilla says its new Firefox terms don't give it ownership of your data". The Verge. Retrieved March 1, 2025.
141. ^ a b "Introducing a terms of use and updated privacy notice for Firefox". The Mozilla Blog. Retrieved March 6, 2025.
142. ^ Perez, Sarah (February 28, 2025). "Mozilla responds to backlash over new terms, saying it's not using people's data for AI". TechCrunch. Retrieved March 1, 2025.
143. ^ Peters, Jay (March 1, 2025). "Mozilla is already revising its new Firefox terms to clarify how it handles user data". The Verge. Retrieved March 19, 2025.
144. ^ Lakshmanan, Ravie (March 1, 2025). "Mozilla Updates Firefox Terms Again After Backlash Over Broad Data License Language". The Hacker News. Retrieved March 1, 2025.
145. ^ Brodkin, Jon (February 28, 2025). "Firefox deletes promise to never sell personal data, asks users not to panic". Ars Technica. Retrieved March 1, 2025.
146. ^ "Localize your open source project with Pontoon". Fosdem. Retrieved March 26, 2024.
147. ^ "Index of /pub/firefox/releases/1.0/win32/". Archived from the original on December 2, 2022. Retrieved August 22, 2011.
148. ^ "Project Fluent". Project Fluent. Archived from the original on March 26, 2024. Retrieved March 26, 2024.
149. ^ "Mozilla launches Fluent 1.0 to revolutionize software localization". Mozilla Press Center. April 17, 2019. Archived from the original on March 26, 2024. Retrieved March 26, 2024.
150. ^ "Firefox in Ubuntu Touch (Libertine)".
151. ^ a b "Firefox users on Windows 7, 8 and 8.1 moving to Extended Support Release". mozilla.org. Mozilla Foundation. Retrieved June 6, 2023.
152. ^ a b c "Firefox ESR schedule". whattrainisitnow.com. Mozilla Foundation. Retrieved September 6, 2024.
153. ^ "Mozilla Firefox ESR 52.9.0 System Requirements". mozilla.org. Mozilla Foundation. Retrieved June 26, 2018.
154. ^ "Update on Firefox Support for Windows XP and Vista". Firefox Future Releases Blog. Mozilla Foundation. December 23, 2016 – via blog.mozilla.org.
155. ^ a b "Mozilla Firefox ESR 10.0.12 System Requirements". mozilla.org. Mozilla Foundation. Retrieved January 8, 2013.
156. ^ "Mozilla Firefox 12.0 System Requirements". mozilla.org. Mozilla Foundation. Retrieved April 24, 2012.
157. ^ Keybl, Alex. "Upcoming Firefox Support Changes". Firefox Future Releases Blog. Retrieved December 10, 2017.
158. ^ "Mozilla sets end of Firefox for Win2K, early XP". March 26, 2012. Retrieved May 7, 2020.
159. ^ a b "Mozilla Firefox 2.0 System Requirements". mozilla.org. Mozilla Foundation. October 24, 2006.
160. ^ Peters, Jay (January 6, 2021). "Firefox's latest update brings native support for Apple's Arm-based Macs". The Verge. Retrieved January 7, 2021.
161. ^ "Firefox users on macOS 10.12, 10.13 and 10.14 moving to Extended Support Release". mozilla.org. Mozilla Foundation. Retrieved June 6, 2023.
162. ^ "Firefox ESR 78.15.0 System Requirements". mozilla.org. Mozilla Foundation. October 5, 2021.
163. ^ "Update on Firefox Support for macOS 10.9, 10.10 and 10.11". Firefox Future Releases Blog. Mozilla Foundation. June 23, 2020 – via blog.mozilla.org.
164. ^ "Mozilla Firefox ESR 45.9.0 System Requirements". mozilla.org. Mozilla Foundation. April 19, 2017.
165. ^ "Mozilla Firefox 48.0.2 System Requirements". mozilla.org. Mozilla Foundation. August 24, 2016.
166. ^ "Firefox 48.0 release notes". August 2, 2016.
167. ^ Brinkmann, Martin (September 20, 2016). "Firefox 49 Release: Find out what is new". Ghacks. Retrieved June 7, 2020.
168. ^ Protalinski, Emil (April 29, 2016). "Mozilla will retire Firefox support for OS X 10.6, 10.7, and 10.8 in August 2016". VentureBeat.
169. ^ "Mozilla Firefox 16.0.2 System Requirements". mozilla.org. Mozilla Foundation. Retrieved November 20, 2012.
170. ^ "Mozilla Firefox 3.6 System Requirements". archive.org. Mozilla Foundation. January 21, 2010. Retrieved December 14, 2012.
171. ^ Nightingale, Johnathan (March 14, 2014). "Update on Metro". mozilla.org. Mozilla Foundation.
172. ^ "Mozilla Firefox 43.0 System Requirements". mozilla.org. Mozilla Foundation. December 15, 2015.
173. ^ a b c d "Firefox System Requirements". mozilla.org. Mozilla Foundation. August 1, 2023. Archived from the original on August 1, 2023. Retrieved August 2, 2023.
174. ^ "Will Firefox work on my mobile device?". Mozlla Support. Mozilla. Archived from the original on December 2, 2013. Retrieved December 3, 2013.
175. ^ a b c "Supported build targets". Firefox Source Docs documentation. Archived from the original on January 16, 2021. Retrieved January 14, 2021.
176. ^ Harmston, Chuck (April 11, 2019). "Firefox Beta for Windows 10 on Qualcomm Snapdragon Always Connected PCs Now Available". Future Releases. Archived from the original on February 21, 2020. Retrieved April 4, 2020.
177. ^ "Mozilla Finally Begins Offering Firefox ARM64 Linux Binaries".
178. ^ a b "Firefox: Private, Safe Browser". App Store. Apple. Archived from the original on August 30, 2017. Retrieved November 24, 2023.
179. ^ Tilley, Chris (April 21, 2006). "Mozilla Firefox and Windows NT 3.51". C:Amie. Archived from the original on December 26, 2018. Retrieved December 25, 2018.
180. ^ Mayo, Mark (December 15, 2015). "Firefox 64-bit Web Browser for Windows Now Available". Future Releases. Mozilla Foundation. Archived from the original on December 14, 2017. Retrieved December 14, 2017 – via blog.mozilla.org.
181. ^ Nightingale, Johnathan (March 14, 2014). "Update on Metro". Firefox Future Releases Blog. Archived from the original on April 24, 2017. Retrieved March 14, 2014.
182. ^ "Mozilla Firefox Web Browser – Supported Android Devices". Mozilla. Archived from the original on June 26, 2013. Retrieved July 20, 2013.
183. ^ Lutz, Zachary (September 21, 2013). "Firefox for Windows 8 enters Aurora channel with touch and gesture support". Engadget. Archived from the original on September 24, 2013. Retrieved September 21, 2013.
184. ^ "Final Firefox version with Windows XP, plugin support released today". Ars Technica. March 7, 2017. Archived from the original on January 14, 2024. Retrieved July 15, 2024.
185. ^ Tung, Liam (October 5, 2017). "Windows XP users: Your last supported refuge in Firefox ends in 2018, says Mozilla". ZDNET. Archived from the original on October 8, 2017. Retrieved July 15, 2024.
186. ^ Warren, Tom (November 9, 2021). "Mozilla's Firefox browser arrives in the Windows store (sic)". The Verge. Archived from the original on December 13, 2021. Retrieved December 13, 2021.
187. ^ Pegoraro, Rob (November 9, 2021). "Firefox Arrives in the Microsoft Store". PC Magazine. Ziff Davis. Archived from the original on December 13, 2021. Retrieved December 13, 2021.
188. ^ Proven, Liam (July 5, 2023). "Firefox 115 browser breathes life into old operating systems". The Register. Archived from the original on July 13, 2024. Retrieved July 15, 2024.
189. ^ Proven, Liam (July 11, 2024). "Firefox 128 bumps system requirements for old boxes". The Register. Archived from the original on July 13, 2024. Retrieved July 15, 2024.
190. ^ a b "Firefox ESR schedule". February 7, 2025. Archived from the original on February 7, 2025. Retrieved February 18, 2025.
191. ^ "Firefox ESR schedule". Firefox ESR schedule. Archived from the original on October 1, 2024. Retrieved September 20, 2024.
192. ^ a b "Firefox Release Calendar". Firefox Release Calendar. Archived from the original on September 24, 2024. Retrieved September 20, 2024.
193. ^ a b "Mozilla Developer Preview Alpha 5 Release Notes". Mozilla. June 14, 2010. Archived from the original on June 29, 2011. Retrieved July 10, 2011.
194. ^ Gibbs, Samuel (April 27, 2011). "TenFourFox brings Firefox 4 to PPC Macs". Engadget. Archived from the original on June 7, 2020. Retrieved June 7, 2020.
195. ^ "Firefox System Requirements". November 9, 2004. Archived from the original on November 11, 2004. Retrieved June 7, 2020.
196. ^ "Firefox System Requirements". November 29, 2005. Archived from the original on December 15, 2005. Retrieved June 7, 2020.
197. ^ "Firefox 3.0 System Requirements". June 17, 2008. Archived from the original on June 7, 2020. Retrieved June 7, 2020.
198. ^ "Firefox 4.0 System Requirements". March 22, 2011. Archived from the original on July 31, 2020. Retrieved June 7, 2020.
199. ^ "Firefox 17.0 System Requirements". November 20, 2012. Archived from the original on July 31, 2020. Retrieved June 7, 2020.
200. ^ "Firefox 48.0 Release Notes". August 2, 2016. Archived from the original on September 20, 2016. Retrieved June 7, 2020.
201. ^ "Update on Firefox support for OS X". April 29, 2016. Archived from the original on June 7, 2020. Retrieved June 7, 2020.
202. ^ "Update on Firefox Support for macOS 10.9, 10.10 and 10.11". June 23, 2020. Archived from the original on July 21, 2020. Retrieved July 28, 2020.
203. ^ "Firefox 78 release notes". June 30, 2020. Archived from the original on June 30, 2020. Retrieved September 8, 2020.
204. ^ "Firefox 79 system requirements". July 28, 2020. Archived from the original on July 28, 2020. Retrieved September 8, 2020.
205. ^ "Firefox 46.0 System Requirements". Mozilla. Archived from the original on January 9, 2018. Retrieved February 26, 2018.
206. ^ "Your hardware is no longer supported | Firefox Help". support.mozilla.org. Archived from the original on June 10, 2024. Retrieved June 10, 2024.
207. ^ "Firefox for Nokia N900 Release Notes". mozilla.org. January 28, 2010. Archived from the original on June 3, 2014. Retrieved February 9, 2012.
208. ^ "Mozilla Launches Firefox 4 for Android, Allowing Users to Take the Power and Customization of Firefox Everywhere". Archived from the original on August 13, 2011. Retrieved March 29, 2011.
209. ^ "System Requirements – Firefox for Android 7.0 release notes". Mozilla website archive. Mozilla. 2013. Archived from the original on September 6, 2014. Retrieved March 28, 2015.
210. ^ "Firefox mobile features". Mozilla. Retrieved January 30, 2010.
211. ^ "Market share for mobile, browsers, operating systems and search engines | NetMarketShare". netmarketshare.com. Archived from the original on November 12, 2020. Retrieved September 6, 2020.
212. ^ a b Zare, Vesta. "Fast, personalized and private by design on all platforms: introducing a new Firefox for Android experience". The Mozilla Blog. Archived from the original on September 5, 2020. Retrieved September 6, 2020.
213. ^ mozilla-mobile/fenix, Mozilla Mobile, September 5, 2020, archived from the original on September 7, 2020, retrieved September 6, 2020
214. ^ "GeckoView in 2019 – Mozilla Hacks – the Web developer blog". Mozilla Hacks – the Web developer blog. Archived from the original on August 17, 2020. Retrieved September 6, 2020.
215. ^ "Firefox Launched a New Android App to Lure Users From Chrome". Wired. ISSN 1059-1028. Archived from the original on August 27, 2020. Retrieved August 28, 2020.
216. ^ "Latest Firefox Update Upsets Users Due To Missing Features". Android Headlines. September 1, 2020. Archived from the original on September 5, 2020. Retrieved September 6, 2020.
217. ^ "Three Reasons not to upgrade to the new Firefox for Android browser right now – gHacks Tech News". Ghacks Technology News. August 7, 2020. Archived from the original on September 17, 2020. Retrieved September 6, 2020.
218. ^ Hellstrom, Jeremy (August 26, 2020). "Maybe Don't Update Firefox for Android". PC Perspective. Archived from the original on September 25, 2020. Retrieved September 6, 2020.
219. ^ "Mozilla promises expanded extensions support following controversial Firefox Android update". Android Police. September 3, 2020. Archived from the original on September 5, 2020. Retrieved September 6, 2020.
220. ^ a b c d "Firefox for Android 141.0.1, See All New Features, Updates and Fixes". July 29, 2025. Retrieved July 29, 2025.
221. ^ a b c d "Firefox for Android 141.0.1 System Requirements". Mozilla.org. July 29, 2025.
222. ^ "Firefox for Android upgrade FAQs". mozilla.org. Mozilla.
223. ^ a b c "Mobile/Platforms/Android". wiki.mozilla.org. Mozilla Foundation. September 28, 2017. System Requirements.
224. ^ "Firefox for Android – Notes (55.0.2)". mozilla.org. Mozilla Foundation. August 16, 2017.
225. ^ "Firefox for Android – Notes (47.0)". mozilla.org. Mozilla Foundation. June 7, 2016.
226. ^ "Mozilla Firefox for Mobile 32 Release Notes". mozilla.org. Mozilla Foundation. September 2, 2014.
227. ^ "What's new in Firefox for iOS (version 96) | Firefox for iOS Help". mozilla.org. Mozilla Foundation. January 11, 2022.
228. ^ Dolecourt, Jessica (May 27, 2010). "Firefox Home: A not-quite Firefox iPhone app". Archived from the original on October 23, 2012. Retrieved June 2, 2010.
229. ^ "Firefox Home Coming Soon to the iPhone". May 26, 2010. Archived from the original on August 30, 2011. Retrieved June 3, 2010.
230. ^ Keizer, Gregg (September 4, 2012). "Mozilla exits iOS as it retires Firefox Home". Computerworld. Archived from the original on September 6, 2012. Retrieved September 14, 2012.
231. ^ Bilton, Ricardo (March 10, 2013). "Mozilla wants to bring Firefox to iOS, but mean ol' Apple's standing in its way". VentureBeat. Archived from the original on October 18, 2016. Retrieved September 18, 2016.
232. ^ Shankland, Stephen (June 4, 2014). "iOS 8 grants new power to rival browsers, Web-based apps". CNET. Archived from the original on September 1, 2016. Retrieved September 18, 2016.
233. ^ "Firefox for iOS Now Available for Preview". September 3, 2015. Archived from the original on September 4, 2015. Retrieved September 7, 2015.
234. ^ Clarke, Gavin (September 4, 2015). "Fruity Firefox: Mozilla caves to Apple, unveils iOS-friendly browser". The Register. Archived from the original on September 6, 2015. Retrieved September 7, 2015.
235. ^ "Update on Firefox for iOS". May 22, 2015. Archived from the original on September 5, 2015. Retrieved September 7, 2015.
236. ^ Calimlim, Aldrin (November 12, 2015). "Finally, Mozilla's Firefox Web browser is now available on iOS". AppAdvice. Archived from the original on October 5, 2016. Retrieved September 6, 2020.
237. ^ Porter, Jon (September 18, 2020). "Here are the browsers iOS 14 now lets you set as default". The Verge. Archived from the original on November 12, 2020. Retrieved November 11, 2020. "All browsers are still required to use WebKit"
238. ^ "App Store Review Guidelines". developer.apple.com. September 12, 2019. Archived from the original on March 4, 2020. Retrieved November 11, 2020. "2.5.6 Apps that browse the web must use the appropriate WebKit framework"
239. ^ Perez, Sarah (November 17, 2016). "Mozilla launches Firefox Focus, a private web browser for iPhone". TechCrunch. Archived from the original on May 10, 2017. Retrieved May 6, 2017.
240. ^ "'Firefox Reality', Mozilla's VR Web Browser, Launches on Major Standalone Headsets". Archived from the original on November 9, 2020. Retrieved October 1, 2020.
241. ^ "Update on Firefox Reality". Archived from the original on July 7, 2022. Retrieved December 22, 2022.
242. ^ "FreeBSD port of Firefox". Archived from the original on October 5, 2014. Retrieved September 30, 2014.
243. ^ "pkgsrc package of Firefox". Archived from the original on September 28, 2021. Retrieved December 10, 2021.
244. ^ "OpenBSD ports ∴ www/mozilla-firefox". ports.su. Archived from the original on December 23, 2014. Retrieved December 23, 2014.
245. ^ Source package of Firefox 3.6.15 Archived March 4, 2016, at the Wayback Machine. pkgsrc-repo.uk.openindiana.org.
246. ^ "[hobbes.nmsu.edu] Viewing file: /pub/os2/apps/internet/www/browser/firefox-38.8.0.en-us.os2-wpi.wpi". hobbes.nmsu.edu. Archived from the original on January 15, 2017. Retrieved October 18, 2016.
247. ^ Rosenthal, Lewis (June 8, 2016). "Arca Noae's support of open source projects: Firefox". Arca Noae. Archived from the original on September 20, 2020. Retrieved September 6, 2020.
248. ^ "The Icon Bar: Firefox_released_for_RISC_OS_5_Updated: The Icon Bar: Firefox released for RISC OS 5 [Updated]". The Icon Bar. Archived from the original on August 13, 2021. Retrieved January 20, 2021.
249. ^ "Bezilla: Mozilla for BeOS". www-archive.mozilla.org. Archived from the original on August 20, 2019. Retrieved August 20, 2019.
250. ^ "BeBytes – The BeOS Software Archive". be.wildman-productions.org. Archived from the original on April 15, 2019. Retrieved August 20, 2019.
251. ^ "Firefox entry on BeBits". Archived from the original on July 17, 2012.
252. ^ "Firefox Bleeding Edge entry on BeBits". Archived from the original on April 15, 2012.
253. ^ "Timberwolf Browser". AmigaOS. August 16, 2011. Retrieved December 24, 2022.
254. ^ "The many ways of running firefox on OpenBSD". OpenBSD Journal. April 25, 2017. Archived from the original on December 28, 2017. Retrieved December 18, 2017.
255. ^ "Directory Listing: /pub/firefox/releases/52.0.2esr/contrib/". Ftp.mozilla.org. Archived from the original on February 15, 2018. Retrieved February 14, 2018.
256. ^ "Mozilla – Firefox, Thunderbird & Sunbird". UNIX Packages - Open Source applications for Sun Solaris. UNIX Packages. December 21, 2011. Archived from the original on December 8, 2015. Retrieved October 29, 2015.
257. ^ "IBM AIX: Web browsers for AIX". 03.ibm.com. Archived from the original on January 5, 2016. Retrieved October 29, 2015.
258. ^ "Mozilla on AIX FAQ". Archive.mozilla.org. Archived from the original on July 6, 2015. Retrieved October 29, 2015.
259. ^ "README Mozilla, v. 1.7.13 for SCO(R) UnixWare(R) 7.1.3 SCO(R) UnixWare(R) 7.1.4". Ftp.sco.com. June 6, 2005. Archived from the original on January 2, 2022. Retrieved October 29, 2015.
260. ^ a b Paul, Ryan (March 18, 2011). "Mozilla outlines 16-week Firefox development cycle". Ars Technica. Archived from the original on April 22, 2023. Retrieved April 22, 2023.
261. ^ Paul, Ryan (February 14, 2011). "Is Mozilla's 2011 roadmap unrealistically ambitious?". Ars Technica. Archived from the original on April 22, 2023. Retrieved April 22, 2023.
262. ^ Siegler, M. G. (April 13, 2011). "Mozilla Introduces Aurora, The Pre-Beta, Post-Nightly Firefox — It's Their "Dev" Build". TechCrunch. Archived from the original on April 22, 2023. Retrieved April 22, 2023.
263. ^ a b Anthony, Sebastian (April 18, 2017). "Firefox kills off Aurora channel to speed up release of new features". Ars Technica. Archived from the original on April 22, 2023. Retrieved April 22, 2023.
264. ^ "How to Use Firefox's New 'Aurora' Release Channel". Wired. April 14, 2011. ISSN 1059-1028. Retrieved April 22, 2023.
265. ^ Kingsley-Hughes, Adrian (September 22, 2011). "Mozilla attempts to appease enterprise users with talk of 42-week Firefox release cycle". ZDNet. Archived from the original on April 22, 2023. Retrieved April 22, 2023.
266. ^ Paul, Ryan (January 10, 2012). "Firefox extended support will mitigate rapid release challenges". ArsTechnica. Archived from the original on April 12, 2012. Retrieved April 4, 2012.
267. ^ Protalinski, Emil (April 17, 2017). "Mozilla kills Firefox Aurora channel, builds will move directly from Nightly to Beta". VentureBeat. Archived from the original on April 22, 2023. Retrieved April 22, 2023.
268. ^ Kothari, Ritu; Or, Yan (September 17, 2019). "Moving Firefox to a faster 4-week release cycle". Mozilla. Archived from the original on May 21, 2023. Retrieved April 22, 2023.
269. ^ Cimpanu, Catalin (September 17, 2019). "Mozilla to release a new Firefox version every four weeks starting next year". ZDNet. Archived from the original on April 22, 2023. Retrieved April 22, 2023.
270. ^ Protalinski, Emil (January 7, 2020). "Firefox 72 arrives with fingerprinting blocked by default, Picture-in-Picture on macOS and Linux". VentureBeat. Archived from the original on April 22, 2023. Retrieved April 22, 2023.
271. ^ Lardinois, Frederic (March 4, 2021). "Google speeds up its release cycle for Chrome". TechCrunch. Archived from the original on April 22, 2023. Retrieved April 22, 2023.
272. ^ "The fall of Firefox: Mozilla's once-popular web browser slides into irrelevance". ZDNET. Archived from the original on June 6, 2024. Retrieved June 6, 2024.
273. ^ Davitt, Killian; Ristea, Dan; Russell, Duncan; Murdoch, Steven J. (2024). "CoStricTor: Collaborative HTTP Strict Transport Security in Tor Browser". Proceedings on Privacy Enhancing Technologies: 345. doi:10.56553/popets-2024-0020. ISSN 2299-0984. Archived from the original on June 6, 2024. Retrieved June 6, 2024.
274. ^ a b "Mozilla Relicensing FAQ". Mozilla. Archived from the original on May 13, 2010. Retrieved January 24, 2007.
275. ^ Stallman, Richard. "On the Netscape Public License". Free Software Foundation. Archived from the original on February 3, 2007. Retrieved January 24, 2007.
276. ^ "Various Licenses and Comments about Them. Mozilla Public License (MPL)". Free Software Foundation. Archived from the original on July 24, 2010. Retrieved January 24, 2007.
277. ^ "Announcing Version 2.0 of the Mozilla Public License". Mozilla. January 3, 2012. Archived from the original on March 6, 2012. Retrieved June 6, 2012.
278. ^ "Firefox 13 released – now using SPDY by default". The H – Open. June 5, 2012. Archived from the original on June 7, 2012. Retrieved June 6, 2012.
279. ^ "Mozilla Trademark Policy". Mozilla. Archived from the original on January 28, 2007. Retrieved January 30, 2007.
280. ^ "Celebrating 20 years of Firefox with 20 red panda cams". The Mozilla Blog. Retrieved December 9, 2024.
281. ^ "MXR is retired". mxr.mozilla.org. Archived from the original on November 5, 2018. Retrieved June 18, 2018.
282. ^ "541761 – Some text implies the Firefox logo is under a non-free copyright license". bugzilla.mozilla.org. Archived from the original on April 20, 2013. Retrieved January 10, 2012.
283. ^ "Legal Stuff". Mozilla Corp. Archived from the original on July 30, 2013. Retrieved March 7, 2009.
284. ^ "Stop Logo Cruelty". Mozilla Corp. Archived from the original on May 22, 2010. Retrieved March 7, 2009. "Don't Create new elements that look enough like the Firefox logo so as to cause confusion."
285. ^ a b "Mozilla Trademark Guidelines". Mozilla. Archived from the original on June 14, 2018. Retrieved May 24, 2024.
286. ^ a b Krishnamurthy, Sandeep (August 1, 2009). "CASE: Mozilla vs. Godzilla — The Launch of the Mozilla Firefox Browser". Journal of Interactive Marketing. 23 (3): 259–271\. doi:10.1016/j.intmar.2009.04.008. ISSN 1094-9968. S2CID 167784443.
287. ^ Warne, Dan (May 7, 2007). "The stoush over Linux distributions using the Firefox trademark". APC Magazine. ACP Magazines Ltd. Archived from the original on August 17, 2011. Retrieved January 18, 2008.
288. ^ "Debian Bug report logs – #354622: Uses Mozilla Firefox trademark without permission". Debian. Archived from the original on February 6, 2013. Retrieved January 30, 2007.
289. ^ "Re: ice weasel". September 23, 2007. Archived from the original on July 6, 2018. Retrieved July 6, 2018.
290. ^ Mozilla Trademark Policy for Distribution Partners Archived April 2, 2013, at the Wayback Machine Version 0.9 (DRAFT). Retrieved November 2, 2006.
291. ^ Garrity, Steven (October 23, 2003). "Branding Mozilla: Towards Mozilla 2.0". Archived from the original on January 15, 2009. Retrieved February 8, 2009.
292. ^ Garrity, Steven (February 9, 2004). "Branding Mozilla: Towards Firefox 1.0". Archived from the original on February 5, 2009. Retrieved February 8, 2009.
293. ^ a b Hicks, Jon (February 9, 2004). "Branding Firefox". Hicksdesign. Archived from the original on February 8, 2009. Retrieved February 8, 2009.
294. ^ Hicks, Jon (December 17, 2004). "Spot the Difference". Hicksdesign. Archived from the original on February 5, 2009. Retrieved February 8, 2009.
295. ^ Martell, Sean (June 27, 2013). "(Re)building a simplified Firefox logo". Reticulating Splines. Archived from the original on July 2, 2013. Retrieved September 5, 2013.
296. ^ Mozilla Trademark Policy FAQ Archived April 7, 2013, at the Wayback Machine: "What are the Mozilla Trademarks and Logos?". Retrieved November 2, 2006
297. ^ Palmer, Judi; Colvig, Mary (October 19, 2005). "Firefox surpasses 100 million downloads". Mozilla. Archived from the original on June 21, 2009. Retrieved February 4, 2007.
298. ^ Ross, Blake (July 7, 2004). "Week 1: Press reviews". Blake Ross. Archived from the original on August 5, 2004. Retrieved February 4, 2007.
299. ^ "We're igniting the web. Join us!". Spread Firefox: Sfx Team's Blog. September 12, 2004. Archived from the original on January 25, 2007. Retrieved February 4, 2007.
300. ^ "Mozilla Foundation Places Two-Page Advocacy Ad in the New York Times" (PDF). Mozilla Foundation. December 15, 2004. Archived (PDF) from the original on June 28, 2018. Retrieved June 15, 2010.
301. ^ Colvig, Mary (July 2, 2008). "Set a Guinness World Record Enjoy a Better Web". Mozilla Blog. Mozilla Foundation. Archived from the original on January 12, 2011. Retrieved May 30, 2008.
302. ^ Keizer, Gregg (March 27, 2011). "Firefox 4 sets unofficial download record". Computerworld. Archived from the original on October 11, 2012. Retrieved August 21, 2012.
303. ^ Snyder, Ryan (February 25, 2011). "Spread Firefox". Mozilla Blog. Archived from the original on June 1, 2012. Retrieved May 15, 2012.
304. ^ Sfx Team (July 16, 2006). "World Firefox Day Launches". Spread Firefox: Sfx Team's Blog. Archived from the original on December 10, 2006. Retrieved January 24, 2007.
305. ^ "Mozilla Foundation Announcement". Mozilla. July 15, 2003. Archived from the original on March 15, 2018. Retrieved June 18, 2018.
306. ^ "Friends of Firefox Frequently Asked Questions". Archived from the original on November 16, 2007. Retrieved November 27, 2007.
307. ^ "Take Back the Field". Oregon State Linux Users Group. August 14, 2006. Archived from the original on October 6, 2011. Retrieved August 28, 2011.
308. ^ Colvig, Mary (February 21, 2008). "500 million Firefox downloads: complete; 500 million grains: in progress". Mozilla Blog. Mozilla. Archived from the original on August 13, 2011. Retrieved June 24, 2009.
309. ^ Tenser, David (December 28, 2007). "Firefox Support Blog " Blog Archive " Firefox Live Chat launching today". The Mozilla Blog. Archived from the original on August 27, 2011. Retrieved August 6, 2009.
310. ^ Brinkmann, Martin (January 2, 2008). "Firefox Live Chat Support". gHacks Technology News. Archived from the original on May 2, 2014. Retrieved May 2, 2014.
311. ^ "Mozilla Blog". The Mozilla Blog. November 14, 2017. Archived from the original on July 23, 2018. Retrieved July 23, 2018.
312. ^ 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.
313. ^ Goodger, Ben (February 14, 2006). "About the Firefox 'memory leak'". MozllaZine weblogs. Archived from the original on July 17, 2011. Retrieved November 17, 2007.
314. ^ "Problematic Extensions". MozillaZine Knowledge Base. January 19, 2007. Archived from the original on May 1, 2011. Retrieved January 24, 2007.
315. ^ "Adobe Reader". MozillaZine Knowledge Base. January 17, 2007. Archived from the original on May 1, 2011. Retrieved January 24, 2007.
316. ^ Muchmore, Michael W. (July 19, 2006). "Which New Browser Is Best: Firefox 2, Internet Explorer 7, or Opera 9?". PC Magazine. Archived from the original on March 17, 2008. Retrieved January 24, 2007.
317. ^ Muradin, Alex (November 30, 2005). "Mozilla Firefox 1.5 Final Review". Softpedia. Archived from the original on October 27, 2006. Retrieved September 22, 2006.
318. ^ Wilton-Jones, Mark. "Browser Speed Comparisons". How To Create. Archived from the original on June 22, 2011. Retrieved January 24, 2007.
319. ^ "Firefox Preloader". SourceForge. Archived from the original on May 13, 2007. Retrieved April 26, 2007.
320. ^ Larkin, Erik (October 24, 2006). "Radically New IE 7 or Updated Mozilla Firefox 2 – Which Browser Is Better?". PC World. Archived from the original on September 13, 2008. Retrieved May 18, 2007.
321. ^ Dargahi, Ross (October 19, 2006). "IE 7 vs IE 6". Zimbra. Archived from the original on June 15, 2008. Retrieved January 24, 2007.
322. ^ Paul, Ryan (March 17, 2008). "Firefox 3 goes on a diet, eats less memory than IE and Opera". Ars Technica. Archived from the original on January 31, 2009. Retrieved June 1, 2008.
323. ^ Ryan, Wagner (March 26, 2008). "Browser Performance Comparisons". CyberNet News. Archived from the original on June 25, 2009. Retrieved June 1, 2008.
324. ^ "Firefox 3.0 Beta 4 Vs Opera 9.50 Beta Vs Safari 3.1 Beta: Multiple Sites Opening Test". The Browser World. March 29, 2008. Archived from the original on June 16, 2008. Retrieved June 1, 2008.
325. ^ Fulton, III, Scott M. (July 1, 2009). "The final score: Firefox 3.5 performs at 251% the speed of 3.0". BetaNews. Archived from the original on July 4, 2009. Retrieved May 4, 2010.
326. ^ Purdy, Kevin (January 26, 2010). "Browser Speed Tests: Firefox 3.6, Chrome 4, Opera 10.5, and Extensions". Lifehacker. Archived from the original on May 4, 2010. Retrieved May 4, 2010.
327. ^ Overa, Adam (February 21, 2012). "Benchmark Analysis: Windows 7 and Ubuntu 11.10". Tom's Hardware. Archived from the original on September 13, 2012. Retrieved April 8, 2012.
328. ^ Overa, Adam (June 30, 2013). "Chrome 27, Firefox 22, IE10, And Opera Next, Benchmarked". Tom's Hardware. Archived from the original on July 3, 2013. Retrieved May 2, 2014.
329. ^ Brinkmann, Martin (January 2, 2014). "Chrome 34, Firefox 29, Internet Explorer 11: Memory Use 2014". gHacks Technology News. Archived from the original on May 5, 2014. Retrieved May 2, 2014.
330. ^ Tanous, Jim (April 1, 2015). "Spartan Benchmarks: Spartan vs. IE, Chrome, Firefox, and Opera". TekRevue. Archived from the original on December 26, 2015. Retrieved January 10, 2016.
331. ^ Coppock, Mark (May 27, 2018). "Battle of the best browsers: Edge vs. Chrome vs. Firefox vs. Safari vs. Opera vs. IE". Digital Trends. Archived from the original on January 3, 2016. Retrieved January 10, 2016.
332. ^ "Microsoft Defender: Firefox-Performance-Bremse nach fünf Jahren gelöst". April 9, 2023.
333. ^ Murray, Matt (November 18, 2017). "Firefox Quantum vs. Chrome: Which Is Faster?". Digital Trends. Archived from the original on May 17, 2018. Retrieved April 23, 2018.
334. ^ Lynn, Bryan; Robbins, Jill (November 15, 2017). "5 Reasons to Try Firefox 'Quantum' Browser". Voice of America (VOA). Archived from the original on November 1, 2018. Retrieved October 31, 2018.
335. ^ "The Best Browser 2019". Archived from the original on July 14, 2019. Retrieved July 15, 2019.
336. ^ "Top 12 Desktop, Mobile, Tablet & Console Browser Versions on July 2025". StatCounter Global Stats.
337. ^ "Top 9 Desktop, Mobile, Tablet & Console Browsers on July 2025". StatCounter Global Stats.
338. ^ Shankland, Stephen (July 31, 2009). "Firefox: 1 billion downloads only part of the story". CNET News. Archived from the original on June 9, 2014. Retrieved December 19, 2009.
339. ^ "Spread Firefox: Mozilla Firefox Download Counts". Mozilla. Archived from the original on July 17, 2005. Retrieved February 14, 2007.
340. ^ Shankland, Stephen (July 1, 2010). "IBM names Firefox its default browser". CNET. Archived from the original on April 18, 2014. Retrieved November 21, 2013.
341. ^ Eggheck, Amir (December 1, 2011). "Chrome Overtakes Firefox Globally for First Time". StatCounter. Archived from the original on December 14, 2017. Retrieved December 17, 2017.
342. ^ "At a Glance". Mozilla Press Center. Mozilla. Archived from the original on December 4, 2014. Retrieved December 7, 2014.
343. ^ Siegler, MG (November 18, 2010). "Mozilla: $104 Million In Revenues, 400 Million Users, Google Deal Running Through 2011". Archived from the original on June 29, 2017. Retrieved June 8, 2011.
344. ^ "Browser Market Share Worldwide". StatCounter Global Stats. Archived from the original on November 3, 2024. Retrieved November 3, 2024.
345. ^ "Desktop Browser Market Share Worldwide". StatCounter Global Stats. Retrieved August 1, 2025.
346. ^ "Firefox Public Data Report". data.firefox.com. Archived from the original on May 4, 2019. Retrieved May 2, 2023.
347. ^ "Desktop Browser Market Share Eritrea". StatCounter Global Stats. Archived from the original on September 3, 2019. Retrieved July 12, 2020.
348. ^ "Desktop Browser Market Share Cuba". StatCounter Global Stats. Archived from the original on September 3, 2019. Retrieved July 12, 2020.
349. ^ "Browsers we support and why – Government Digital Service". gds.blog.gov.uk. Archived from the original on December 29, 2023. Retrieved December 29, 2023.
350. ^ "US Web Design System Documentation". U.S. Web Design System (USWDS). Retrieved December 29, 2023.
351. ^ "analytics.usa.gov | The US government's web traffic. Analytics.usa.gov is migrating to a new web analytics platform. (Archived)". December 29, 2023. Archived from the original on December 29, 2023. Retrieved December 29, 2023.

## Further reading

[edit]

* Cheah, Chu Yeow (2005). Firefox Secrets: A Need-to-Know Guide. O'Reilly. ISBN 978-0-9752402-4-3.
* Feldt, Kenneth C. (2007). Programming Firefox. O'Reilly. ISBN 978-0-596-10243-2.
* Granneman, Scott (2005). Don't Click on the Blue e!: Switching to Firefox. O'Reilly. ISBN 978-0-596-00939-7.
* Hofmann, Chris; Marcia Knous; John Hedtke (2005). Firefox and Thunderbird Garage. Prentice Hall PTR. ISBN 978-0-13-187004-8.
* McFarlane, Nigel (2005). Firefox Hacks. O'Reilly. ISBN 978-0-596-00928-1.
* Reyes, Mel (2005). Hacking Firefox: More Than 150 Hacks, Mods, and Customizations. Wiley. ISBN 978-0-7645-9650-6.
* Ross, Blake (2006). Firefox for Dummies. Wiley. ISBN 978-0-471-74899-1.

## External links

[edit]

Firefox at Wikipedia's sister projects

* Definitions from Wiktionary
* Media from Commons
* News from Wikinews
* Textbooks from Wikibooks
* Resources from Wikiversity
* Data from Wikidata
* Documentation from MediaWiki

* Official website
* Firefox at Microsoft Store

* v
* t
* e

Mozilla

Projects

| Mozilla
Labs|

* Bugzilla
* ChatZilla
* Jetpack
* Lightning
* Persona
* Prism
* Raindrop
* Skywriter
* Sunbird
* PDF.js
* Ubiquity

|

Mozilla
Research|

* Open Media
* Rust
* Shumway
* WebAssembly
* WebXR
* asm.js
* Daala
* Firefox OS
* OpenFlint

Mozilla
Foundation|

* Mozilla Location Service
* SeaMonkey
* Mozilla Monitor
* Thunderbird
* Mozilla VPN
* List of products

| Firefox|

* Firefox Browser
* Early version history
* 2
* 3
* 3.5
* 3.6
* 4
* Version history
* for Android
* Focus
* Sync
* Pocket

|

Origins|

* Mozilla Application Suite
* Netscape Navigator
* Netscape Communicator
* Netscape Communications
* Beonex Communicator

Frameworks|

* Add-on
* Gecko
* Necko
* NPAPI

Components|

* Composer
* NSPR
* NSS
* Rhino
* SpiderMonkey
* Tamarin
* Features

Typefaces|

* Fira
* Zilla Slab

Discontinued|

* Calendar Project
* Camino
* Firefox Lockwise
* Firefox Send
* Minimo
* XUL
* XBL
* XPCOM
* XPInstall
* XULRunner

Forks|

* Basilisk
* Classilla
* Flock
* Floorp
* Goanna
* IceCat
* LibreWolf
* Miro
* Netscape 9
* Pale Moon
* Portable Edition
* Swiftfox
* Swiftweasel
* Waterfox
* xB Browser
* Zen Browser

Discontinued projects are in italics. Some projects abandoned by Mozilla that are still maintained by third parties are in underline.

Organization

| Foundation|

* Mozilla Foundation
* Mozilla Corporation
* Mozilla Messaging

|

Official affiliates|

* Mozilla China
* Mozilla Europe (defunct)
* Mozilla Japan

People|

* Mitchell Baker
* David Baron
* Tantek Çelik
* Laura Chambers
* Brendan Eich
* John Hammink
* Johnny Stenbäck
* Doug Turner

Community

* mozdev.org
* MDN Web Docs
* MozillaZine

Other topics

* Mozilla Manifesto
* The Book of Mozilla
* Code Rush
* Mozilla Public License
* Mascot
* Debian–Mozilla trademark dispute
* Common Voice
* Mozilla Corp. v. FCC (2019)

* v
* t
* e

Gopher

A protocol for document search and retrieval on the Internet

Clients|

| Active|

* Dooble
* Lynx
* W3m
* WebPositive

|

Support ended|

* Epiphany
* Firefox
* Flock
* SeaMonkey

Discontinued|

* Agora
* Arachne
* Amaya
* Arena
* AT&T Pogo
* Beonex Communicator
* Camino
* Cello
* Classilla
* Conkeror
* Cyberjack
* ELinks
* Epiphany
* Galeon
* GopherVR
* IBrowse
* Internet Explorer
* Internet Explorer for Mac
* Kazehakase
* libwww
* Line Mode Browser
* Minimo
* Minuet
* Mosaic
* Mothra
* Mozilla Application Suite
* Netscape
* OmniWeb
* SlipKnot
* Songbird
* tkWWW
* UdiWWW
* xB Browser

Server software|

* Bucktooth
* NetPresenz
* PyGopherd
* Squid
* Synchronet

Search engines|

* Jughead
* Veronica
* Wide area information server (WAIS)

Content|

* AllMusic
* CCSO Nameserver
* Gophermap
* Phlog

Hosts|

* SDF Public Access Unix System
* The WELL

Developers|

* Mark P. McCahill

* v
* t
* e

Content aggregators

Client
software|

| Standalone|

* Akregator
* BlogBridge
* Feedreader
* Flipboard
* Genieo
* Google Currents
* Google News
* Liferea
* NetNewsWire
* Newsbeuter
* NewsFire
* QuiteRSS
* RSS Bandit
* RSS Guard
* RSSOwl
* Seesmic

|

Web browsers|

* AOL Explorer
* Basilisk
* Camino
* iCab
* Chrome (Android)
* Firefox
* Flock
* GNOME Web
* Internet Explorer
* K-Meleon
* Kazehakase
* Maxthon
* Microsoft Edge
* Netscape Browser
* Netscape Navigator 9
* OmniWeb
* Opera
* Otter Browser
* Pale Moon
* Safari
* SeaMonkey
* Shiira
* Sleipnir
* Tencent Traveler
* Vivaldi
* Waterfox

Email clients|

* Apple Mail
* Claws Mail
* Gnus
* HCL Domino
* Microsoft Outlook
* Mozilla Thunderbird
* Netscape Messenger 9
* Pegasus Mail
* The Bat!
* Windows Live Mail
* Zimbra

Plugins|

* Cooliris
* Sage

Web apps or
mobile apps|

* Bloglines
* CommaFeed
* Daylife
* Digg Reader
* Drupal
* Feedbin
* Feedly
* FriendFeed
* Google News
* Google Reader
* iGoogle
* dotCMS
* Imooty.eu
* Inoreader
* LinkedIn Pulse
* Magnolia
* My Yahoo!
* News360
* NewsBlur
* NewsBreak
* Newsknowledge
* Netvibes
* Pageflakes
* Planet
* Rojo.com
* Prismatic
* Spokeo
* The Old Reader
* Tiny Tiny RSS
* TweetDeck
* WebGUI
* Windows Live Personalized Experience
* winnowTag

Media
aggregators|

| Podcast client|

* Adobe Media Player
* Akregator
* Amarok
* Flock
* Apple Podcasts
* Juice
* MediaMonkey
* Miro
* Rhythmbox
* Songbird
* Winamp
* Zune

|

RSS + BitTorrent|

* BitLord
* BitTorrent 6
* Deluge
* Miro
* qBittorrent
* Tribler
* μTorrent
* Vuze

Related
articles|

* Comparison of feed aggregators
* History of media aggregation
* RSS enclosure

Italics indicate discontinued software.

* v
* t
* e

Timeline of web browsers

General

* Comparison
* lightweight
* History
* List
* for Unix
* Usage share

1990s

| 1990|

* WorldWideWeb (Nexus)

|

1991|

* Line Mode Browser
* libwww

1992|

* Erwise
* MacWWW (Samba)
* MidasWWW
* tkWWW
* ViolaWWW

1993|

* AMosaic
* Arena
* Cello
* Emacs/W3
* Lynx 2
* NCSA Mosaic
* VMS Mosaic

1994|

* AirMosaic
* Internet in a Box
* ANT Fresco
* Argo
* IBM WebExplorer
* SlipKnot
* Minuet
* Navipress
* Mosaic/Mosaic Netscape/Netscape Navigator
* Spyglass Mosaic
* TCP/Connect II

1995|

* Agora
* ALynx
* AMSD Ariadna
* Cyberjack
* eWorld Web Browser
* Grail
* Internet Explorer 1
* Internet Explorer 2
* Netscape Navigator 2
* NetShark
* OmniWeb
* HotJava
* UdiWWW
* WebShark
* w3m

1996|

* Cyberdog
* Arachne
* AWeb
* IBrowse
* Amaya
* Internet Explorer 3
* MSN Program Viewer
* Netscape Navigator 3
* Opera 2
* Oracle PowerBrowser
* tcpCONNECT4
* Voyager

1997|

* Netscape Communicator
* Internet Explorer 4
* Opera 2.1

1998|

* NeoPlanet
* Mozilla Application Suite
* Opera 3–3.21

1999|

* iCab
* Internet Explorer 5
* OmniWeb 3
* Opera 3.5–3.62

2000s

| 2000|

* Beonex Communicator
* Galeon
* K-Meleon
* Konqueror
* MediaBrowser
* Netscape 6
* Opera 4–4.02

|

2001|

* iCab 2.5
* Internet Explorer 6
* MSN Explorer
* OmniWeb 4
* Opera 5–5.12

2002|

* Camino
* Epiphany
* Netscape 7
* Opera 6–6.1

2003|

* GreenBrowser
* Maxthon
* Opera 7–7.3
* Safari
* SlimBrowser

2004|

* Phoenix/Firebird/Firefox
* Opera 7.5–7.55

2005|

* AOL Explorer
* Deepnet Explorer
* Firefox 1.5
* Netscape Browser
* Opera 8–8.54
* Safari 2

2006|

* Firefox 2
* Internet Explorer 7
* Opera 9–9.27

2007|

* Maxthon 2
* Opera 9.5–9.64
* Safari 3
* SeaMonkey 1.1

2008|

* Chrome
* Firefox 3
* Netscape Navigator 9
* NetSurf 1.2

2009|

* Chrome 2–3
* Firefox 3.5
* Internet Explorer 8
* Opera 10–10.63
* Pale Moon
* Safari 4
* SeaMonkey 2.0

2010s

| 2010|

* Chrome 4–8
* Firefox 3.6
* Lunascape 6.0.1
* Maxthon 3
* NetSurf 2.5
* Opera 11–11.64
* Safari 5

|

2011|

* Chrome 9–16
* Firefox 4–9
* Internet Explorer 9
* Lunascape 6.5
* Opera 12–12.17
* SeaMonkey 2.1–2.4
* Waterfox

2012|

* Chrome 17–23
* Firefox 10–17
* Internet Explorer 10
* Lunascape 6.7
* Maxthon 3.4
* NetSurf 2.9
* Safari 6
* Yandex

2013|

* Chrome 24–31
* Firefox 18–26
* Internet Explorer 11
* Opera 15–18
* Safari 7
* SeaMonkey 2.15–2.22

2014|

* Chrome 32–39
* Firefox 27–34
* Lunascape 6.9
* NetSurf 3.1
* Opera 19–26
* Safari 8
* SeaMonkey 2.23–2.31

2015|

* Chrome 40–47
* Firefox 35–43
* Lunascape 6.10–6.12
* Microsoft Edge 20, 25
* Opera 27–34
* Safari 9
* SeaMonkey 2.32–2.39
* Vivaldi Technical Preview 1–Beta 2

2016|

* Brave 0.7–0.12
* Chrome 48–55
* Firefox 44–50
* Lunascape 6.13–6.15
* Microsoft Edge 38
* Opera 35–42
* Safari 10
* Vivaldi Beta 3–1.6
* Yandex 16

2017|

* Brave 0.13–0.19
* Chrome 56–63
* Firefox 51–57
* Microsoft Edge 40, 41
* Opera 43–49
* Safari 11
* SeaMonkey 2.46–2.49
* Vivaldi 1.7–1.13
* Yandex 17

2018|

* Basilisk
* Brave 0.20–0.60
* Chrome 64–71
* Firefox 58–64
* Microsoft Edge 42–44
* Opera 50–57
* Safari 12
* Vivaldi 1.14–2.2
* Waterfox 56.0–56.2
* Yandex 18

2019|

* Brave 0.61–1.1
* Chrome 72–79
* Firefox 65–71
* Microsoft Edge 44
* Opera 58–65
* Safari 13
* Vivaldi 2.3–2.10
* Waterfox 60.1–68.0a2
* Whale 1.4–1.5
* Yandex 19

2020s

| 2020|

* Brave 1.2–1.18
* Chrome 80–87
* Firefox 72–84
* Microsoft Edge 79–87
* Opera 66–73
* SeaMonkey 2.53
* Vivaldi 2.11–3.5
* Yandex 20
* Safari 14

|

2021|

* Brave 1.19–1.33
* Chrome 88–96
* Firefox 85–95
* Microsoft Edge 88–96
* Opera 74–82
* SeaMonkey 2.53.10.2
* Vivaldi 3.6–5.0
* Yandex 21
* Safari 15

2022|

* Arc 0.46–0.81
* Brave 1.34–1.46
* Chrome 97–108
* Firefox 96–108
* Microsoft Edge 97–108
* Opera 83–94
* Vivaldi 5.1–5.6
* Yandex 22
* Safari 16

2023|

* Arc 0.85–1.21
* Brave 1.47–1.61
* Chrome 109–120
* Firefox 109–121
* Microsoft Edge 109–120
* Opera 95–106
* Vivaldi 5.7–6.5
* Yandex 23
* Safari 17

2024|

* Arc 1.25–1.74
* Brave 1.62–1.73
* Chrome 121–131
* Firefox 122–133
* Microsoft Edge 121–131
* Opera 107–115
* Vivaldi 6.6–7.0
* Yandex 24
* Safari 18

2025|

* Arc 1.77–
* Brave 1.74–
* Chrome 132–
* Firefox 134–
* Microsoft Edge 132–
* Opera 116–
* Vivaldi 7.1–
* Yandex 25
* Safari 26

Related topics

* 3D Markup Language for Web
* ALIWEB
* ARPANET
* ASCII
* BITNET
* Browser wars
* CompuServe
* Elm
* Email
* File Transfer Protocol
* Gopher
* HTML
* HyperCard
* HyTelnet
* NCSA Telnet
* NLS
* Prodigy
* Teletext
* Telnet
* Usenet
* UUCP
* Videotex
* Viewdata
* Virtual Reality Markup Language
* Web page
* Whole Internet User's Guide and Catalog
* World Wide Web
* X.25

* v
* t
* e

Web browsers

* Features
* standards
* protocols

| Features|

* Bookmarks
* Extensions
* Privacy mode

|

Web standards|

* HTML
* v5
* CSS
* DOM
* JavaScript
* WebAssembly
* Web storage
* IndexedDB
* WebGL
* WebGPU

Protocols|

* HTTP
* Encryption
* Cookies
* third-party
* OCSP
* WebRTC
* WebSocket

Active

| Blink-based|

| Proprietary|

* Google Chrome
* Arc
* Avast
* Cốc Cốc
* Comodo
* Ecosia
* Epic
* Huawei
* Maxthon
* Microsoft Edge
* Opera (Mobile)
* Puffin
* QQ
* Samsung
* Silk
* Sleipnir
* SRWare
* UC
* Vivaldi
* Whale
* Yandex

|

FOSS|

* Chromium
* Brave
* Dooble
* Falkon
* Otter
* Supermium
* ungoogled

Gecko-based|

* Firefox
* Floorp
* GNU IceCat
* LibreWolf
* Midori
* SlimBrowser
* Tor
* Zen
* Gecko forks
* Basilisk
* K-Meleon
* Pale Moon
* SeaMonkey
* Waterfox

WebKit-based|

* Safari
* GNOME Web
* iCab
* Orion

Multi-engine|

* 360
* DuckDuckGo
* Konqueror
* Lunascape
* NetFront
* qutebrowser

Other|

* Dillo
* eww
* Flow
* Ladybird
* Links
* Lynx
* NetSurf
* Opera Mini
* w3m

Discontinued

| Blink-based|

* Beaker
* Citrio
* Flock
* Redcore
* Rockmelt
* SalamWeb
* Sputnik
* Torch

|

Gecko-based|

* Beonex
* Camino
* Classilla
* Conkeror
* Firefox Lite
* Galeon
* Ghostzilla
* IceDragon
* Kazehakase
* Kylo
* Lotus
* MicroB
* Minimo
* Mozilla suite
* PirateBrowser
* Pogo
* Strata
* Swiftfox
* Swiftweasel
* TenFourFox
* Timberwolf
* xB

MSHTML-based|

* Internet Explorer
* AOL
* Deepnet
* GreenBrowser
* MediaBrowser
* MSN Explorer
* MSN Program Viewer
* NeoPlanet
* NetCaptor
* SpaceTime
* ZAC

WebKit-based|

* Arora
* BOLT
* Dolphin
* Fluid
* Google TV
* Iris
* Mercury
* Nokia Symbian
* OmniWeb
* Opera Coast
* Origyn
* QtWeb
* Shiira
* Steel
* surf
* Uzbl
* WebPositive
* xombrero

Other|

* abaco
* Amaya
* Arachne
* Arena
* Blazer
* Cake
* CM
* Deepfish
* Edge Legacy
* ELinks
* Gazelle
* HotJava
* IBM Home Page Reader
* IBM WebExplorer
* IBrowse
* Internet Explorer for Mac
* KidZui
* Line Mode
* Mosaic
* MSN TV
* NetPositive
* Netscape
* Skweezer
* Skyfire
* ThunderHawk
* Vision
* WinWAP
* WorldWideWeb

* List
* Comparison
* Category

Authority control databases

International|

* VIAF

National|

* Germany
* United States
* France
* BnF data
* Czech Republic
* Israel

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