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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.
Does blocking ads by DNS still work? Current ads are AFAIK more sophisticated
Yes, it works well. There are some ads, like those built in to apps and pages for self-promotion (Microsoft having an ad for office on their own website, for example), that cant be blocked without disabling the service itself because the ad dns is the same as the content dns, but otherwise it works well.