At this point, what's really needed is an additional layer of abstraction. The site needs to run in a virtual computer within the browser, identical to all oth

At this point, what's really needed is an additional layer of abstraction. The site needs to run in a virtual computer within the browser, identical to all others, and every interaction where any information from the user is needed for the site needs to go through a filter that will sufficiently randomize and sanitize identifying inputs to make it much much harder to fingerprint. That will probably break some content like games and whatnot, but the reality is, as much as everyone loves their web-apps, it really is a tiny fraction of web-browsing.