Forgot to initialize XPCOM but it still works

I wrote a small app that used XPCOM.  I had forgot to call 
NS_InitXPCOM2() and NS_ShutdownXPCOM(), but the application still 
worked.  It registered the components and I was able to access them.  I 
had thought this was not possible.  What makes it still work?  I'm very 
curious about this.

Evan