nsIHistoryEntry Interface

 
 A readonly property that returns the URI
 of the current entry. The object returned is
 of type nsIURI

readonly attribute nsIURI URI

 
 A readonly property that returns a boolean
 flag which indicates if the entry was created as a 
 result of a subframe navigation. This flag will be
 'false' when a frameset page is visited for
 the first time. This flag will be 'true' for all
 history entries created as a result of a subframe
 navigation.

readonly attribute boolean isSubFrame

 
 A readonly property that returns the title
 of the current entry.  The object returned
 is a encoded string

readonly attribute wstring title