Soon Web sites contained more than just text, they also had sound and video files. They now extend out to other file types including sensory emulations. The URL contains a set of instructions that are read by the browser. The beginning of the URL contains the protocol. The second section of the URL reveals the domain.
Directories follow the domain.
Lastly is the name of the document. You can call any program like this a browser, of course. A program that did nothing but show pictures could be a picture browser. But nowadays we keep the name with the Web browsers like Internet Explorer, Opera, and Netscape. By In mid-1994 Netscape Communications, then called the Mosaic browser was starting to make splashes outside of the academic circles where it had begun.