This article covers features introduced in SeaMonkey 2
smileIBookmarkRoots interface represents a container for bookmark roots. Roots are the top level parents for the various types of bookmarks in the system. Empty as it is only used as the return type for Application.bookmarks. It will be supported once the Places bookmarks API is supported in SeaMonkey.
smileIBookmarkRoots is defined in http://mxr.mozilla.org/comm-central/source/suite/smile/public/smileIApplication.idl.