Internet Explorer (web browser)

Internet Explorer (web browser)
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Name	Internet Explorer
Developer	Microsoft
Released	1995
Discontinued	2022
Engine	Trident, Chakra
Operating system	Microsoft Windows, macOS (historical), Windows Phone (historical)
License	Proprietary

Internet Explorer (web browser) Internet Explorer was a series of graphical web browsers developed by Microsoft first released in 1995 as part of Internet Explorer 1. It became the dominant browser during the late 1990s and early 2000s, competing with Netscape Navigator, Mozilla Firefox, and later Google Chrome and Opera. Internet Explorer played a major role in the browser wars and in shaping web standards and desktop integration across Microsoft Windows editions.

History

Internet Explorer originated when Microsoft licensed source code from Spyglass, Inc. and integrated it into Windows 95 through the MSN and Windows 95 OSR2 distribution. During the late 1990s Internet Explorer gained market position following the decline of Netscape Communications Corporation and the outcome of the United States v. Microsoft antitrust case. The release of Internet Explorer 6 coincided with Windows XP, while successive versions paralleled initiatives such as the development of Windows Vista, Windows 7, and the emergence of alternative engines like WebKit adopted by Apple and others. In response to mobile trends and competition from Google and Mozilla Foundation, Microsoft eventually developed Edge based on Chromium before retiring Internet Explorer in 2022.

Features and Architecture

Internet Explorer's architecture combined the proprietary Trident rendering engine and, in later releases, the Chakra JScript engine, integrating tightly with ActiveX and Windows Registry for extensibility. It supported features such as Document Object Model manipulation, CSS rendering aligned with W3C specifications, and protocol handlers for HTTP, HTTPS, and FTP. Integration with Microsoft Exchange Server and Outlook enabled enterprise scenarios, while technologies like Active Scripting and VBScript offered automation on Windows Server deployments. Components such as the Windows Shell and COM interfaces allowed browser toolbars, extensions, and enterprise policy controls through Group Policy.

Versions and Platform Support

Internet Explorer was released across multiple major versions—1 through 11—with platform support spanning Windows 95, Windows 98, Windows ME, Windows 2000, Windows XP, Windows Vista, Windows 7, Windows 8.1, and select builds of macOS through a discontinued port. Mobile variants targeted Windows Phone and embedded systems. Major milestones include Internet Explorer 4's integration with the Windows Desktop Update, Internet Explorer 6's bundling with Windows XP, Internet Explorer 7's tabbed browsing aligned with competitors like Mozilla Firefox 2, Internet Explorer 8's improved standards support, and Internet Explorer 9's hardware-accelerated graphics comparable to Adobe Flash Player acceleration on DirectX. Internet Explorer 11 was the final desktop release for modern Windows 10 before Microsoft shifted to EdgeHTML and later Chromium-based Edge.

Security and Criticism

Internet Explorer's long history attracted scrutiny over security vulnerabilities such as buffer overflow exploits, cross-site scripting issues, and drive-by download attacks that affected enterprises and consumers alike. High-profile incidents prompted collaborations with organizations like CERT Coordination Center and regulatory attention in cases tied to malware distribution and browser sandboxing limitations. Critics including advocates from Electronic Frontier Foundation and contributors to Mozilla Foundation highlighted concerns about proprietary extensions like ActiveX and their attack surface compared with sandboxed models used by Google Chrome and Safari. Legal and policy debates involving antitrust litigation and standards compliance also shaped perceptions of the browser in academic and industry forums such as World Wide Web Consortium discussions.

Market Share and Legacy

At its peak, Internet Explorer held dominant market share across consumer and enterprise segments, influencing web development practices and corporate deployment strategies at companies such as IBM, HP, and Dell. Decline in market share followed the rise of Mozilla Firefox, Google Chrome, and mobile-first platforms like Android and iOS, as measured by analytics providers and industry reports. Its legacy includes contributions to web standards debates, the proliferation of proprietary web technologies, and the impetus for modern browser security and standards enforcement. Efforts to preserve compatibility persist through enterprise modes, archived builds, and community projects referencing historical browsers like Netscape Navigator.

Integration and Compatibility

Internet Explorer was tightly integrated with Microsoft Windows APIs, enabling features such as Windows Update distribution of security patches, Group Policy controls for enterprise administrators, and interoperability with Microsoft Office and Exchange Server. Compatibility mechanisms such as document modes and compatibility view helped legacy intranet applications and site-specific behaviors originally built for older engines. The browser supported plugin architectures and extensions through COM and ActiveX, which affected cross-platform portability and interoperability with standards-driven projects from organizations like the World Wide Web Consortium and the IETF.

Category:Web browsers Category:Microsoft software