Google announces a new measure to remove unwanted ad injectors from the advertising ecosystem. Ad injectors are programs that insert new ads, or replace existing ones, in the pages users visit while browsing the web. Google has received almost 300,000 user complaints about them in Chrome since the beginning of 2015. Advertisers often don’t know their ads are being injected, which means they don’t have any idea where they are running. Publishers, meanwhile, arent being compensated for these ads, and more importantly, they unknowingly put their visitors in harms way.”]
Source: https://security.googleblog.com/2015/09/cutting-unwanted-ad-injectors-out-of.html