nsIWebContentHandlerRegistrar
 
 Applications wishing to use web content handlers need to implement this
 interface. Typically they will prompt the user to confirm adding an entry
 to the local list. 

 The component must have the contract id defined below so that nsNavigator
 can invoke it. 
[scriptable, uuid(e6a75410-c93e-42bf-84ca-a5c3ec34a2f1)]
interface nsIWebContentHandlerRegistrar : nsISupports

Methods

 See documentation in nsIDOMClientInformation.idl
 The additional contentWindow param for both methods represents the dom
 content window from which the method has been called.
void registerContentHandler(in DOMString mimeType, in DOMString uri, in DOMString title, in nsIDOMWindow contentWindow)

          
void registerProtocolHandler(in DOMString protocol, in DOMString uri, in DOMString title, in nsIDOMWindow contentWindow)