Browsers

An Introduction to Browsers on Download.com

Browsers, often called Web browsers, are software clients that allow users to navigate to sites on the World Wide Web. The majority of these Web sites use the Hypertext Transfer Protocol (HTTP), but many browsers can also interpret other protocols, including FTP, RSS, and P2P protocols such as BitTorrent. Hypertext pioneer Tim Berners-Lee created the first ever Web browser, WorldWideWeb, in 1990, but the software didn't become popular until the release of NCSA Mosaic, the first graphical client.

Browsers truly hit the mainstream with the launch of Netscape Navigator, which was later shortened to simply Netscape, though the free client's popularity was radically affected by the 1995 release of Internet Explorer, Microsoft's entry into the browser market. In the years since, IE has completely dominated the market, only recently losing ground to alternative browsers such as Mozilla Firefox and Opera.

Aside from general Web browsers, various subsets of the category offer special services. Offline browsers cache content from the Internet for future reference when you're not connected to a network. Newsreaders manage content from Usenet newsgroups and syndicated feeds.

In recent years, the open-source browser Mozilla Firefox has earned praise for the ability of third-party developers to easily create extensions that add functionality. Among the thousands of home-brewed add-ons for Firefox, we've narrowed down our favorites in a collection of the best. The Microsoft browser also allows for IE add-ons, but its closed framework makes it a bit more difficult for developers.