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Browser wars is a metaphorical term that refers to competitions for dominance in usage share in the web browser marketplace. The term is often used to denote two specific rivalries: the competition that saw Microsoft's Internet Explorer replace Netscape's Navigator as the dominant browser during the late 1990s and the erosion of Internet Explorer's market share since 2003 by a collection of emerging browsers including Mozilla Firefox, Safari, Google Chrome, and Opera.
The World Wide Web is an Internet-based hypertext system invented in the late 1980s and early 1990s by Tim Berners-Lee. Berners-Lee wrote the first web browser WorldWideWeb, later renamed Nexus, and released it for the NeXTstep platform in 1991.
By the end of 1992 other browsers had appeared, many of them based on the libwww library. These included Unix browsers such as Line-mode, ViolaWWW, Erwise and MidasWWW, and MacWWW/Samba for the Mac. This created choice between browsers and hence the first real competition, especially on Unix.
Further browsers were released in 1993, including Cello, Arena, Lynx and Mosaic. The most influential of these was Mosaic, a multiplatform browser developed at NCSA. By October 1994, Mosaic was "well on its way to becoming the world's standard interface", according to Gary Wolfe of Wired.
Several companies licensed Mosaic to create their own commercial browsers, such as Spry Mosaic and Spyglass Mosaic. One of the Mosaic developers, Marc Andreessen, founded Mosaic Communications Corporation and created a new web browser named Mosaic Netscape. To resolve legal issues with NCSA, the company was renamed Netscape Communications Corporation and the browser Netscape Navigator. The Netscape browser improved on Mosaic's usability and reliability and was able to display pages as they loaded. By 1995, helped by the fact that it was free for non-commercial use, the browser dominated the emerging World Wide Web.
The first browser war
By mid-1995 the World Wide Web had received a great deal of attention in popular culture and the mass media. Netscape Navigator was the most widely used web browser and Microsoft had licensed Mosaic to create Internet Explorer 1.0, which it had released as part of the Microsoft Windows 95 Plus! Pack in August.
Internet Explorer 2.0 was released as a free download three months later. Unlike Netscape Navigator it was available to all Windows users for free, even commercial companies. Further new versions of Netscape Navigator (later bundled with other applications and branded Netscape Communicator) and Internet Explorer were released at a rapid pace over the following few years.
Internet Explorer began to approach feature parity with Netscape with version 3.0 (1996), which offered scripting support and the market's first commercial Cascading Style Sheets (CSS) implementation.
In October 1997 Internet Explorer 4.0 was released. The release party in San Francisco featured a ten-foot-tall letter "e" logo. Netscape employees showing up to work the following morning found the giant logo on their front lawn, with a sign attached that read "From the IE team ... We Love You". The Netscape employees promptly knocked it over and set a giant figure of their Mozilla dinosaur mascot atop it, holding a sign reading "Netscape 72, Microsoft 18" representing the market distribution.
Internet Explorer 4 changed the tides of the browser wars. It was integrated into Microsoft Windows, which IT professionals and industry critics considered technologically disadvantageous and an apparent exploitation of Microsoft's monopoly on the PC platform. Users were discouraged from using competing products because IE was "already there" on their PCs.
During these releases it was common for web designers to display 'best viewed in Netscape' or 'best viewed in Internet Explorer' logos. These images often identified a specific browser version and were commonly linked to a source from which the stated browser could be downloaded. These logos generally recognized the divergence between the standards supported by the browsers and signified which browser was used for testing the pages. In response, supporters of the principle that web sites should be compliant with World Wide Web Consortium standards and hence viewable with any browser started the "Viewable With Any Browser" campaign, which employed its own logo similar to the partisan ones.
Internet Explorer 5 & 6
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</tr> </table> Microsoft had three strong advantages in the browser wars.
One was resources: Netscape began with about 80% market share and a good deal of public goodwill, but as a relatively small company deriving the great bulk of its income from what was essentially a single product (Navigator and its derivatives), it was financially vulnerable. Netscape's total revenue never exceeded the interest income generated by Microsoft's cash on hand. Microsoft's vast resources allowed IE to remain free as the enormous revenues from Windows were used to fund its development and marketing. Netscape was commercial software for businesses but provided for free for home and education users; Internet Explorer was provided as free for Windows users, cutting off a significant revenue stream.
Another advantage was that Microsoft Windows had over 90% share of the operating system market. IE was bundled with every copy of Windows; therefore Microsoft was able to dominate the market share easily as customers had IE as a default. In this time period, many new computer purchases were first computer purchases for home users or offices, and many of the users had never extensively used a web browser before, so had nothing to compare with and little motivation to consider alternatives; the great set of features they had gained in gaining access to the Internet and the World Wide Web at all made any modest differences in browser features or ergonomics pale in comparison.
The effect of these actions was to "cut off Netscape's air supply". These actions eventually led to the United States Microsoft antitrust case in 1998 which found that Microsoft had abused its monopoly on operating systems to unfairly dominate the market and eliminate competition. This, together with several bad business decisions on Netscape's part, led to Netscape's defeat by the end of 1998, after which the company was acquired by America Online for USD $4.2 billion. Internet Explorer became the new dominant browser, attaining a peak of about 96% of the web browser usage share during 2002, more than Netscape had at its peak.
The first browser war ended with Internet Explorer having no remaining serious competition for its market share. This also brought an end to the rapid innovation in web browsers; until 2006 there was only one new version of Internet Explorer since version 6.0 had been released in 2001. Internet Explorer 6.0 Service Pack 1 was developed as part of Windows XP SP1, and integrated into Windows Server 2003. Further enhancements were made to Internet Explorer in Windows XP SP2 (released in 2004), including a pop-up blocker and stronger default security settings against the installation of ActiveX controls.
The browser wars encouraged three specific kinds of behavior among their combatants.
Support for web standards was severely weakened. For years, innovation in web development stagnated as developers had to use obsolete and unnecessarily complex techniques to ensure their pages would render properly in Netscape Navigator and Internet Explorer. Netscape Navigator 4 and IE6 lacked full compliance with several standards, including CSS and the PNG image format.
The second browser war
After the defeat of Netscape by Internet Explorer, Netscape open-sourced their browser code, which led to the formation of the Mozilla Foundation—a primarily community-driven project to create a successor to Netscape. Development continued for several years with little widespread adoption until a stripped-down browser-only version of the full suite was created, which included features, such as tabbed browsing and a separate search bar, that had previously only appeared in Opera. The browser-only version was initially named Phoenix, but because of trademark issues that name was changed, first to Firebird, then to Firefox. This browser became the focus of the Mozilla Foundation's development efforts and Mozilla Firefox 1.0 was released on 9 November 2004. Since then it has continued to gain an increasing share of the browser market.
In 2003, Microsoft announced that Internet Explorer 6 Service Pack 1 would be the last standalone version of its browser. Future enhancements would be dependent on Windows Vista, which would include new tools such as the WPF and XAML to enable developers to build extensive Web applications.
In response, in April 2004, the Mozilla Foundation and Opera Software joined efforts to develop new open technology standards which add more capability while remaining backward-compatible with existing technologies. The result of this collaboration was the WHATWG, a working group devoted to the fast creation of new standard definitions that would be submitted to the W3C for approval.
On 15 February 2005, Microsoft announced that Internet Explorer 7 would be available for Windows XP SP2 and later versions of Windows by mid-2005. The announcement introduced the new version of the browser as a major upgrade over Internet Explorer 6 SP1.
Opera had been a long-time small player in the browser wars, known for introducing innovative features such as tabbed browsing and mouse gestures, as well as being lightweight but feature-rich. The software, however, was commercial, which hampered its adoption compared to its free rivals until 2005, when the browser became freeware. On 20 June 2006, Opera Software released Opera 9 including an integrated source viewer, a BitTorrent client implementation and widgets. It was the first Windows browser to pass the Acid2 test. Opera Mini, a mobile browser, has significant mobile market share as well as being available on the Nintendo DS and Wii.
On 18 October 2006, Microsoft released Internet Explorer 7. It included tabbed browsing, a search bar, a phishing filter, and improved support for Web standards - all features familiar to Opera and Firefox users. Microsoft distributed Internet Explorer 7 to genuine Windows users (WGA) as a high priority update through Windows Update. Typical market share analysis showed only a slow uptake of Internet Explorer 7, and after statistics in September 2007 from w3schools.com showed Mozilla Firefox at 35.4% had taken over from Internet Explorer 6 at 34.9% as the most popular browser with Internet Explorer 7 lagging behind in third place at 20.8%, Microsoft dropped the requirement for WGA and made Internet Explorer 7 available to all Windows users in October 2007.
On 24 October 2006, Mozilla released Mozilla Firefox 2.0. It included the ability to reopen recently closed tabs, a session restore feature to resume work where it had been left after a crash, a phishing filter and a spell-checker for text fields.
In 2003, Apple had begun work on a new browser to replace Internet Explorer for Mac, as Microsoft announced on 13 June 2003 it was discontinuing their browser on the Mac platform. Basing the rendering engine on the open-source KHTML rendering engine from the Konqueror project, Apple created the WebKit project and a browser named Safari, which shipped with Mac OS X v10.3 later that year. On 6 June 2007, Apple released a beta version of Safari 3 for Microsoft Windows.
On 19 December 2007, Microsoft announced that an internal build of Internet Explorer 8 has passed the Acid2 CSS test in "IE8 standards mode" - the last of the major browsers to do so.
On 28 December 2007, Netscape announced that support for its Mozilla-derived Netscape Navigator would be discontinued on 1 February 2008, suggesting its users migrate to Mozilla Firefox. However, on 28 January 2008, Netscape announced that support would be extended to 1 March 2008, and mentioned Flock, alongside Firefox, as an alternative to its users.
Mozilla released Firefox 3.0 on 17 June 2008, with performance improvements, and other new features. Firefox 3.5 followed on 30 June 2009 with further performance improvements, native integration of audio and video, and more privacy features.
On September 10, 2009, Opera Software released Opera 10, which added Opera Turbo, a page compression system, a redesigned Speed Dial, and other improved features
NetApplications also reported that, as of December 2009, Internet Explorer had a 63% market share, Firefox 25%, Chrome 5%, Safari 4%, Opera 2%, and leaving all the others sharing the remaining 1%.
As of mid-December 2009, StatCounter reports that its measurements make Firefox 3.5 the most popular browser, when counting individual browser versions, passing Internet Explorer 7. This is the first reported ending of Internet Explorer's long period of dominance in the browser wars.  Previously Internet Explorer had the largest market share by all measurement means both individually as separate versions and as a whole but by this measure it has now conceded the former distinction.  Net Applications report on different data and they still have Internet Explorer as more popular than Firefox both by version and as a whole.
Other browser competition
Internet Explorer has, as of July 2009, the largest usage share on Windows, with Mozilla Firefox closing in as the second most used web browser. In June, 2007, Apple's Safari browser was released for Windows in beta form. In March, 2008, Apple released Safari 3.1 and began including it as a pre-selected update in the Apple Software Update program. Since then, Safari's market share on Windows has tripled and it is currently competing for the third place along with the Opera and Google Chrome web browsers. Google released its own browser, named Google Chrome, on September 2, 2008, borrowing technology both from Apple's Safari and Mozilla's open-source Firefox, among others, that included UI components similar to some of the latest Internet Explorer and Safari versions' components.
Other notable browsers for Windows are SeaMonkey, a replacement for the Mozilla Application Suite and the discontinued Netscape 9. Front ends for the IE shell like Maxthon, Avant Browser and Enigma Browser that added features like tabbed browsing to IE were once popular, but with the advent of Internet Explorer 7, are falling out of use since Internet Explorer 7 now includes tabbed browsing. Orca Browser is also available made by the makers of Avant Browser (Avant Force), but is based on the Gecko Engine (Firefox).
Linux and Unix
The Unix-based Konqueror browser is part of the KDE project and is the primary competitor against Mozilla-based browsers (Firefox, Mozilla/SeaMonkey, Epiphany, Galeon, etc.) for market share on Unix-like systems. Konqueror's KHTML engine is an API for the KDE desktop. Derivative browsers and web-browsing functionality (for example, Amarok has a Wikipedia sidebar that gives information about the current artist) based on KDE use KHTML.
Mac OS X
Safari is Apple's web browser for Mac OS X, and also has the highest usage share on Mac OS X. The web browser is based on WebKit, a derivative of the KHTML engine. Other Mac browsers including iCab (since 4.0), OmniWeb (since 4.5), and Shiira, use the WebKit API, and many other Macintosh programs add web-browsing functionality through WebKit. Mozilla Firefox and Opera Browser also have high usage on Mac OS X.
Camino is a Mozilla-based Gecko browser for the Mac OS X platform, and uses Mac's native Cocoa interface like Safari does, instead of Mozilla's XUL which is used in Firefox. It was initially developed by Dave Hyatt, until he was hired by Apple to develop Safari.
Opera Mini is a popular web browser on mobile devices such as most J2ME Java enabled internet connected phones and smartphones because of its small footprint. Opera Mobile for smartphones main competition is from Netfront. Sony developed a mobile browser for their PSP, using Netfront's codebase. Sony's Playstation 3 also includes a web browser. PC Site Viewer, the web browser included on many Japanese cellular phones, is based on Opera. In February, 2006 it was announced that Nintendo "will release an add-on card" with a version of Opera for the Nintendo DS (Nintendo DS Browser). This DS browser has since been criticized for its lack of Flash support and slowness. Opera is also used as a web browser on the Wii console.
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