"Prerendering kicks in as soon as a user begins typing in the URL bar of the browser and Chrome auto-completes a site's address and determines high likelihood that the site is the intended destination."
I stopped using Google Chrome after following incident:
I was browsing the web, something related to artificial intelligence, and I was typing the actual address of the web site in the address bar. Without looking I pressed ENTER. What happened is that Chrome, instead of taking me to the web site, decided that I was looking for something else and took me to the web site which turned out to be brought down by my government due to pedofile content! It was not even close to what I typed into address bar!
It means that my government now probably has my IP and a record of me trying to access illegal web site.
This "prerendering" thing, if I understood it correctly, means that Google Chrome is fetching web pages from many web sites that Google Chrome "thinks" you want to access.
Good luck with that!