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Google tries to defend its Web Environment Integrity
(techreport.com)
This is a most excellent place for technology news and articles.
They don't care about a "safe web environment". That is not making them any more money. Knowing much more about their users and being able to perfectly match everything a user does anywhere with Googles advertising business, though, will.
This is actually in correct. They do care about it because they are going to enforce a standard. Which means they will be able to force ads to be displayed. Ads is Google's main revenue source.