The Federal Trade Commission has ordered Google to pay $22.5 million for violating user privacy on its Apple's Safari browser. It's the biggest FTC fine ever issued for a commission violation. The federal agency found that Google had been tracking "cookies" on Google sites for Apple Safari users. It was also sending targeted ads to those users, which violated another settlement between the FTC and the search-engine giant. Google claimed that a tweak in Apple's browser caused an unintentional violation, but the FTC was not swayed by such an argument. "A company like Google, which is a steward of information for hundreds of millions of people has to do better," David Vladeck, the FTC director of the Bureau of Consumer Protection, told reporters on a conference call following the announcement. The potential privacy violation was first detected by Jonathan Mayer, a Standford University graduate student, who realized that Google was still tracking his cookies, even though he had tried to block it. "This seems to be the kind of thing the company shouldn't be doing," Mayer told ABC News in February.