It wasn't long before the browser wars heated up. Microsoft purchased the source code for Mosaic and created Internet Explorer, and Netscape navigator was becoming very popular. Until 1999, Netscape had the market share, but due to a large marketing campaign resulting in Microsoft's inclusion of Internet Explorer in every shipped version of Windows the tables turned for Netscape. Now, Netscape has a negligible impact on the market share, and the new war is between Internet Explorer and Mozilla Firefox.
For the first decade of the world wide web's existence, most websites were simple and based on HTML and basic designs. However, recently there has been a movement to what has been called the Web 2.0 era, a concept that refers to a supposed second generation of the internet which concentrates on the user experience. Social networking websites, such as MySpace and Facebook, are well and truly embedded in the Web 2.0 generation, and as such, most websites have followed suit in integrating some form of user interaction, such as comment systems, blogs and forums.