Definition: A browser is software that provides access to the Internet and allows the user to view web pages. There are different browsers that vary depending on the operating system and the tool on which it is consulted (computer, touch pad, mobile phone, etc.). The most used browsers in the world are Internet Explorer, Google Chrome, Mozilla Firefox and Safari. Among the various functionalities of browsers, we can mention the "favorite" which allows the Internet user to establish the list of sites he consults most often or the history which stores the address of the sites consulted in the memory. course of a specified period.