If you choose to delete the cache whenever Firefox exits it’s gone, right ? Wrong ! Sure, it got deleted from the hard disk but every file recovery utility, like Recuva, will be able to restore the deleted cache which means that everyone may take a look at each and every website that you visited during your last browsing session.
Use a Ramdisk to speed up Applications
Many modern computers have one, two or even more gigabytes of ram that can be put to good use by creating a Ramdisk that is a virtual drive that uses part of the computers ram. The Ramdisk can be used like every other hard drive, you can copy applications and files to it and start them from there if they allow that. It is for instance possible to move portable applications like Firefox, Thunderbird or Audacity into the Ramdisk and use the advantage that those applications are actually residing in memory which speeds up loading times a lot.

