Accessing cache files on Mac

On my Mac laptop running OS X 10.5.8 I have two browsers I need to access the cache. It occurred to me this would be a great place to start because all BSD people know terminal. :) Using the terminal, could I access the cache so I could select / save as pdf and print? Camino and Opera browsers.
 
Dropped this in Off-Topic because it's not 'FreeBSD-proper'. YMMV. And OP: stick to essential information.
 
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