This is the correct answer. All of the replies saying to use Firefox/support FOSS are missing the point. Once Google rolls this out and promotes it as higher security and guaranteed ad impressions, it will become the standard because all of the websites you want to use will opt in. It won't do you much good to keep using Firefox when your bank, your employer/school, and every news/weather/sports site you try to use require a Google-verified, ad-displaying browser. It's not our choice to make, and that's the point of doing it this way.

I'd go one cynical step further to say that once they have complete control over how pages are displayed on your end, they'll roll out a subscription for ad-free* browsing, which will eventually include ads anyway a couple years down the road.