Secure-Sanitizer is an addon allowing not to delete, but to wipe (DoD 3 passes) browsing/history datas, cookies, cache etc (and even flash cookies if Better Privacy is used at the same time, and if "add LSO item to Firefox 'Clear History' dialog and settings" is selected in Better Privacy option).
To my knownledge, Secure Sanitizer is the only addon or script allowing that.
Secure Sanitizer is perfectly doing its job until 3.6.22 FF version, but unfortunately it works no more with 6.02 version, even with the addon Check Compatibility enabled, and even in modifying max version in secure_sanitizer.xpi.
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