What is an external viewer or “helper application” and how do I use one?
“Viewer” and “helper application” are terms to describe an auxiliary application used to support MIME (Multipurpose Internet Mail Extension) types or file formats which your Web browser does not support automatically. For example, most Web browsers are not equipped to play sound files. Therefore, you must tell or “configure” your browser to launch a second piece of software which can play a sound file when you download one. The way in which you specify a viewer for each given file format varies across browsers. Generally, these assignments are made in the “Options” or “Preferences” area of your browser. Please note, not all Web browsers support the use of external viewers — the NetCruiser (TM) Browser, for example, does not.
