I've seen that. He basically looks through his history with a script and then wgets it, as well as submitting to archive systems. That's both wasteful on bandwidth as everything is downloaded twice, and anything not public needs to be done manually with cookies. He also can't prove that they came from a site even if it used https.
I was thinking something like a browser extension that just made sure nothing downloaded was ever deleted. I wonder if chrome has a hook for when it internally deletes something, that a program could instead copy it and convert it to some format?
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