Controls how file URLs are formatted. The Max Compatibility setting
will format them as file://///server/share which both Internet
Explorer and Mozilla-based browsers such as Firefox and SeaMonkey
support, while the Internet Explorer only setting will format them as
file://server/share.
Note that for Mozilla-based browsers you will also need to enable
permission for HTML pages to open files by creating a user.js
in your profiles directory (where prefs.js is) that contains
(note: lines wrapped to fit the printed page):