Firefox's disk cache

I am able to set the disk cache to 0 so it will only keep copies of web pages in memory. I like doing

this especially when I want to increase my speed and privacy (CCleaner only needs to shred the history and

cookies instead of all the files on disk).

With broadband, do I even need a disk cache?

If you have a high or unlimited download limit you may not need it,

I still have it set because even on a 512/128 it can take a while to re-download a page.