Pretty much the solution to better browsing that I've been thinking of for some time and of course never managed to even start about implementing it (or believing I could or should): have one browser / hidden level get all web pages complete with all the bad stuff (or at least the required cookies and advertising) left in, then give the user a sanitized view of that. Note you could do things like rendering obnoxious play-on-load videos as subdued stills that still allow the user to click on to view if they feel inclined; also should be possible to somehow cut the ads out of YT videos with some more work, and YT wouldn't know (the way it should be).
