This is going to be such a benefit to law enforcement. Being able to just scan the history of the machine to see if a suspect had a illegal file and then delete

This is going to be such a benefit to law enforcement. Being able to just scan the history of the machine to see if a suspect had a illegal file and then deleted it, or what they were doing before they wiped their browser history is going to cause a ton more successful court cases. That said, it makes going to random websites from comment chains or user submitted stories much more dangerous. If they lead to illegal content, it's now stored ready to be used against you if law enforcement ever wants to take a close look at you.