Google's Chrome Web browser has begun blocking some of the Net's most annoying types of ads. Chrome's built-in ad filter blocks ads based on standards devised by the Coalition for Better Ads, an industry group whose membership roster includes Google, Facebook, Microsoft, Procter & Gamble, Unilever and The Washington Post. The group was formed to do something to blunt consumers' bad experiences with advertising on the Web, said CBA spokesperson Brendan McCormick.