Linux Mac OSX Windows 
 JAR URLs have the following syntax

 jar:<jar-file-uri>!/<jar-entry>

 EXAMPLE: jar:http://www.big.com/blue.jar!/ocean.html

 The nsIURL methods operate on the <jar-entry> part of the spec.
[scriptable, uuid(c7e410d3-85f2-11d3-9f63-006008a6efe9)]
interface nsIJARURI : nsIURL

Attributes

 Returns the entry specified for this JAR URI.
 eg ocean.html
attribute AUTF8String JAREntry 
 Returns the root URI (the one for the actual JAR file) for this JAR.
 eg http://www.big.com/blue.jar
attribute nsIURI JARFile