XPCOM

Also known as Cross Platform Component Object Model

Cross Platform Component Object Model (XPCOM) is a cross-platform component model from Mozilla. It is similar to Component Object Model (COM), Common Object Request Broker Architecture (CORBA) and system object model (SOM). It features multiple language bindings and interface description language (IDL) descriptions, which allow programmers to plug their custom functions into the framework and connect them with other components.