Total noob/dumb question here:

I have Firefox clear my cache and cookies automatically every time I close Firefox. I also use CCleaner; which I have set to clean everything 7 times over. My question is, since I have Firefox clearing my cache every time I close it, does CCleaner still clean the cache and cookies from FF too? Or should I turn the function off in FF so CCleaner can clean everything 7 times.

Hope all of that made sense....