This library deals with the very system-dependent task of opening a
web page in a browser. See also
library(url) and the HTTP
BROWSERor uses netscape if this variable is not set. If the browser is either
netscape, www_open_url/1 first tries to open a new window on a running browser using the
-remoteoption of Netscape. If this fails or the browser is not
netscapethe system simply passes the URL as first argument to the program.