Older people browse the internet in a different way to younger people. This creates significant challenges for those who wish to design web sites which appeal and can be used effectively by people of all ages. This study investigated how older and younger adult web users browse web pages. It found that older people experience more difficulties in using computers and browsing the web than younger people. In particular, older people read on-screen information as quickly as younger people, but move the mouse more slowly, and when progressing through a hierarchy of screens follow a different decision-making process. These age-related differences have important implications for web design.