system
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@ Fract504,
if you have a fast connection, just set the cache to use 0kb from the tools/options/privacy in Firefox. Only reason I can see for cacheing any net session would be for off-line browsing or if you use a dial-up connection to speed up page rendering.
I use F/fox here in the U.K. with the above setting on a cable connection with no hit on page load speeds.