Interface nsIRequestContextServiceType

The nsIRequestContextService is how anyone gets access to a request context when they haven't been explicitly given a strong reference to an existing one. It is responsible for creating and handing out strong references to nsIRequestContexts, but only keeps weak references itself. The shared request context will go away once no one else is keeping a reference to it. If you ask for a request context that has no one else holding a reference to it, you'll get a brand new request context. Anyone who asks for the same request context while you're holding a reference will get a reference to the same request context you have.