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Web browser

web browsers, web browsers for windows
A web browser commonly referred to as a browser is a software application for retrieving, presenting, and traversing information resources on the World Wide Web An information resource is identified by a Uniform Resource Identifier URI/URL and may be a web page, image, video or other piece of content Hyperlinks present in resources enable users easily to navigate their browsers to related resources

Although browsers are primarily intended to use the World Wide Web, they can also be used to access information provided by web servers in private networks or files in file systems

The major web browsers are Firefox, Google Chrome, Internet Explorer/Microsoft Edge, Opera, and Safari


  • 1 History
  • 2 Business models
  • 3 Function
  • 4 Market share
  • 5 Features
    • 51 User interface
    • 52 Privacy and security
    • 53 Standards support
    • 54 Extensibility
  • 6 Components
  • 7 See also
  • 8 References
  • 9 External links


Main article: History of the web browser

The first web browser was invented in 1990 by Sir Tim Berners-Lee Berners-Lee is the director of the World Wide Web Consortium W3C, which oversees the Web's continued development, and is also the founder of the World Wide Web Foundation His browser was called WorldWideWeb and later renamed Nexus

Marc Andreessen, inventor of Netscape Navigator

The first commonly available web browser with a graphical user interface was Erwise The development of Erwise was initiated by Robert Cailliau

In 1993, browser software was further innovated by Marc Andreessen with the release of Mosaic, "the world's first popular browser", which made the World Wide Web system easy to use and more accessible to the average person Andreesen's browser sparked the internet boom of the 1990s The introduction of Mosaic in 1993 – one of the first graphical web browsers – led to an explosion in web use Andreessen, the leader of the Mosaic team at National Center for Supercomputing Applications NCSA, soon started his own company, named Netscape, and released the Mosaic-influenced Netscape Navigator in 1994, which quickly became the world's most popular browser, accounting for 90% of all web use at its peak see usage share of web browsers

Microsoft responded with its Internet Explorer in 1995, also heavily influenced by Mosaic, initiating the industry's first browser war Bundled with Windows, Internet Explorer gained dominance in the web browser market; Internet Explorer usage share peaked at over 95% by 2002

WorldWideWeb for NeXT, released in 1991, was the first web browser

Opera debuted in 1996; it has never achieved widespread use, having less than 2% browser usage share as of February 2012 according to Net Applications Its Opera-mini version has an additive share, in April 2011 amounting to 11% of overall browser use, but focused on the fast-growing mobile phone web browser market, being preinstalled on over 40 million phones It is also available on several other embedded systems, including Nintendo's Wii video game console

In 1998, Netscape launched what was to become the Mozilla Foundation in an attempt to produce a competitive browser using the open source software model That browser would eventually evolve into Firefox, which developed a respectable following while still in the beta stage of development; shortly after the release of Firefox 10 in late 2004, Firefox all versions accounted for 7% of browser use As of August 2011, Firefox has a 28% usage share

Apple's Safari had its first beta release in January 2003; as of April 2011, it had a dominant share of Apple-based web browsing, accounting for just over 7% of the entire browser market

The most recent major entrant to the browser market is Chrome, first released in September 2008 Chrome's take-up has increased significantly year by year, by doubling its usage share from 8% to 16% by August 2011 This increase seems largely to be at the expense of Internet Explorer, whose share has tended to decrease from month to month In December 2011, Chrome overtook Internet Explorer 8 as the most widely used web browser but still had lower usage than all versions of Internet Explorer combined Chrome's user-base continued to grow and in May 2012, Chrome's usage passed the usage of all versions of Internet Explorer combined By April 2014, Chrome's usage had hit 45%

Internet Explorer was deprecated in Windows 10, with Microsoft Edge replacing it as the default web browser

Business models

The ways that web browser makers fund their development costs has changed over time The first web browser, WorldWideWeb, was a research project

In addition to being freeware, Netscape Navigator and Opera were also sold commercially

Internet Explorer, on the other hand, was bundled free with the Windows operating system and was also downloadable free, and therefore it was funded partly by the sales of Windows to computer manufacturers and direct to users Internet Explorer also used to be available for the Mac It is likely that releasing IE for the Mac was part of Microsoft's overall strategy to fight threats to its quasi-monopoly platform dominance – threats such as web standards and Java – by making some web developers, or at least their managers, assume that there was "no need" to develop for anything other than Internet Explorer In this respect, IE may have contributed to Windows and Microsoft applications sales in another way, through "lock-in" to Microsoft's browser

In January 2009, the European Commission announced it would investigate the bundling of Internet Explorer with Windows operating systems from Microsoft, saying "Microsoft's tying of Internet Explorer to the Windows operating system harms competition between web browsers, undermines product innovation and ultimately reduces consumer choice" Microsoft Corp v Commission

Safari and Mobile Safari were likewise always included with OS X and iOS respectively, so, similarly, they were originally funded by sales of Apple computers and mobile devices, and formed part of the overall Apple experience to customers

Some commercial web browsers are paid by search engine companies to make their engine default, or to include them as another option For example, Yahoo! pays Mozilla, the maker of Firefox, to make Yahoo! Search the default search engine in Firefox Mozilla makes enough money from this deal that it does not need to charge users for Firefox By virtue of common ownership, Microsoft Edge, Internet Explorer, and Google Chrome default to their respective vendors' own search engines, Bing and Google Search, and may integrate with other platforms offered by the vendor This encourages the use of their first-party services, which in turn, exposes users to advertising that can be used as a source of revenue

Many less-well-known free software browsers, such as Konqueror, were hardly funded at all and were developed mostly by volunteers free of charge


Most used web browser by country, as of May 2012   Internet Explorer   Firefox   Google Chrome   Opera Most used web browser by country, as of June 2015   Google Chrome   Firefox   Safari   UC   Iron   Internet Explorer   Opera   Android   Phantom   No info

The primary purpose of a web browser is to bring information resources to the user "retrieval" or "fetching", allowing them to view the information "display", "rendering", and then access other information "navigation", "following links"

This process begins when the user inputs a Uniform Resource Locator URL, for example http://enwikipediaorg/, into the browser The prefix of the URL, the Uniform Resource Identifier or URI, determines how the URL will be interpreted The most commonly used kind of URI starts with http: and identifies a resource to be retrieved over the Hypertext Transfer Protocol HTTP Many browsers also support a variety of other prefixes, such as https: for HTTPS, ftp: for the File Transfer Protocol, and file: for local files Prefixes that the web browser cannot directly handle are often handed off to another application entirely For example, mailto: URIs are usually passed to the user's default e-mail application, and news: URIs are passed to the user's default newsgroup reader

In the case of http, https, file, and others, once the resource has been retrieved the web browser will display it HTML and associated content image files, formatting information such as CSS, etc is passed to the browser's layout engine to be transformed from markup to an interactive document, a process known as "rendering" Aside from HTML, web browsers can generally display any kind of content that can be part of a web page Most browsers can display images, audio, video, and XML files, and often have plug-ins to support Flash applications and Java applets Upon encountering a file of an unsupported type or a file that is set up to be downloaded rather than displayed, the browser prompts the user to save the file to disk

Information resources may contain hyperlinks to other information resources Each link contains the URI of a resource to go to When a link is clicked, the browser navigates to the resource indicated by the link's target URI, and the process of bringing content to the user begins again

Market share

Desktop/laptop browser statistics
Google Chrome    6255%
Mozilla Firefox    15%
Internet Explorer    1073%
Safari    475%
Microsoft Edge    301%
Opera    175%
Yandex Browser    049%
Coc Coc    039%
UC Browser    019%
360 Secure Browser    018%
Maxthon    018%
Sogou Explorer    016%
Chromium    016%
QQ Browser    011%
Mozilla Suite    004%
Phantom    004%
Pale Moon    003%
Microsoft-WebDAV    003%
Vivaldi    002%
Amigo    002%
SeaMonkey    002%
Other    007%
Desktop web browser market share according to StatCounter for September 2016


For more details on this topic, see Comparison of web browsers

Available web browsers range in features from minimal, text-based user interfaces with bare-bones support for HTML to rich user interfaces supporting a wide variety of file formats and protocols Browsers which include additional components to support e-mail, Usenet news, and Internet Relay Chat IRC, are sometimes referred to as "Internet suites" rather than merely "web browsers"

All major web browsers allow the user to open multiple information resources at the same time, either in different browser windows or in different tabs of the same window Major browsers also include pop-up blockers to prevent unwanted windows from "popping up" without the user's consent

Most web browsers can display a list of web pages that the user has bookmarked so that the user can quickly return to them Bookmarks are also called "Favorites" in Internet Explorer In addition, all major web browsers have some form of built-in web feed aggregator In Firefox, web feeds are formatted as "live bookmarks" and behave like a folder of bookmarks corresponding to recent entries in the feed In Opera, a more traditional feed reader is included which stores and displays the contents of the feed

Furthermore, most browsers can be extended via plug-ins, downloadable components that provide additional features

User interface

Some home media devices now include web browsers, like this LG Smart TV The browser is controlled using an on-screen keyboard and LG's "Magic Motion" remote

Most major web browsers have these user interface elements in common:

  • Back and forward buttons to go back to the previous resource and forward respectively
  • A refresh or reload button to reload the current resource
  • A stop button to cancel loading the resource In some browsers, the stop button is merged with the reload button
  • A home button to return to the user's home page
  • An address bar to input the Uniform Resource Identifier URI of the desired resource and display it
  • A search bar to input terms into a web search engine In some browsers, the search bar is merged with the address bar
  • A status bar to display progress in loading the resource and also the URI of links when the cursor hovers over them, and page zooming capability
  • The viewport, the visible area of the webpage within the browser window
  • The ability to view the HTML source for a page

Major browsers also possess incremental find features to search within a web page

Privacy and security

Main article: Browser security

Most browsers support HTTP Secure and offer quick and easy ways to delete the web cache, download history, form and search history, cookies, and browsing history For a comparison of the current security vulnerabilities of browsers, see comparison of web browsers

Standards support

Early web browsers supported only a very simple version of HTML The rapid development of proprietary web browsers led to the development of non-standard dialects of HTML, leading to problems with interoperability Modern web browsers support a combination of standards-based and de facto HTML and XHTML, which should be rendered in the same way by all browsers


A browser extension is a computer program that extends the functionality of a web browser Every major web browser supports the development of browser extensions


Web browsers consist of a user interface, layout engine, rendering engine, JavaScript interpreter, UI backend, networking component and data persistence component These components achieve different functionalities of a web browser and together provide all capabilities of a web browser

See also

  • Internet portal
  • Software portal
  • Geobrowsing
  • Headless browser
  • Internet OS
  • List of web browsers
  • Mobile browser
  • Timeline of web browsers
  • Web browser engines


  1. ^ Jacobs, Ian; Walsh, Norman 15 December 2004 "URI/Resource Relationships" Architecture of the World Wide Web, Volume One World Wide Web Consortium Retrieved 30 June 2009 
  2. ^ Fitzpatrick, Jason 22 March 2009 "Five Best Web Browsers" Lifehacker Gawker Media 
  3. ^ Wayner, Peter 27 April 2011 "Battle of the Web browsers" Infoworld IDG 
  4. ^ Tibken, Shara 17 October 2012 "Aereo TV streaming expands to major Web browsers" CNET CBS Interactive 
  5. ^ "Tim Berners-Lee: WorldWideWeb, the first Web client" W3org Retrieved 2011-12-07 
  6. ^ a b "Bloomberg Game Changers: Marc Andreessen" Bloomberg 17 March 2011 Retrieved 2011-12-07 
  7. ^ a b "Mozilla Firefox Internet Browser Market Share Gains to 74%" Search Engine Journal 24 November 2004 Retrieved 2011-12-07 
  8. ^ Stewart, William "Web Browser History" Retrieved 5 May 2009 
  9. ^ a b c "StatCounter Global Stats – Browser, OS, Search Engine including Mobile Usage Share" Retrieved 2 May 2015 
  10. ^ "Internet Explorer usage to plummet below 50 percent by mid-2012" 3 September 2011 Retrieved 4 September 2011 
  11. ^ "CNN Money claims that Chrome is more popular than IE8" CNN 16 December 2011 Retrieved 19 December 2011 
  12. ^ "StatCounter Global Stats – Browser, OS, Search Engine including Mobile Usage Share" Retrieved 2 May 2015 
  13. ^ "StatCounter Global Stats – Browser, OS, Search Engine including Mobile Usage Share" Retrieved 2 May 2015 
  14. ^ Warren, Tom March 24, 2015 "Microsoft relegates Internet Explorer to a 'legacy engine' to make way for new browser" The Verge Vox Media 
  15. ^ "BBC NEWS – Business – Microsoft is accused by EU again" Retrieved 2 May 2015 
  16. ^ "European Commission – PRESS RELEASES – Press release – Antitrust: Commission confirms sending a Statement of Objections to Microsoft on the tying of Internet Explorer to Windows" Retrieved 2 May 2015 
  17. ^ "Browser Information" DBF Retrieved 2012-06-07 
  18. ^ "Top 5 Desktop browser on Sept 2016" StatCounter 
  19. ^ "The SeaMonkey Project" Mozilla Foundation 7 November 2008 Retrieved 30 June 2009 
  20. ^ "Cyberdog: Welcome to the 'doghouse!" 5 July 2009 Retrieved 30 June 2009 
  21. ^ Teelucksingh, Dev Anand "Interesting DOS programs" Opus Networkx Retrieved 30 June 2009 
  22. ^ Andersen, Starr; Abella, Vincent 15 September 2004 "Part 5: Enhanced Browsing Security" Changes to Functionality in Microsoft Windows XP Service Pack 2 Microsoft Retrieved 30 June 2009 
  23. ^ "Pop-up blocker" Mozilla Foundation Retrieved 30 June 2009 
  24. ^ "Safari: Using The Pop-Up Blocker" Mac Tips and Tricks WeHostMacs 2004 Retrieved 30 June 2009 
  25. ^ "Simple settings" Opera Tutorials Opera Software Retrieved 30 June 2009 
  26. ^ Bokma, John "Mozilla Firefox: RSS and Live Bookmarks" Retrieved 30 June 2009 
  27. ^ "RSS newsfeeds in Opera Mail" Opera Software Retrieved 30 June 2009 
  28. ^ "About Browsers and their Features" SpiritWorks Software Development Retrieved 5 May 2009 
  29. ^ "Behind the scenes of modern web browsers" Tali Garsiel Retrieved 12 October 2013 

External links

Media related to Web browsers at Wikimedia Commons

  • Architecture of the World Wide Web, Volume One
  • WorldWideWeb: Proposal for a HyperText Project
  • How Browsers Work: Behind the scenes of modern web browsers

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