Feb. 1: Rival Microsoft Corp. runs full-page newspaper ads slamming Google and its new policy. Microsoft uses the opportunity to tout its own Web-based alternatives, saying for instance that users of its free email service, Hotmail, don't have to worry about the content of their emails being used to help target ads.
Feb. 3: The European Union's data protection authorities release a letter to Google asking the company to delay the new policy until they have verified that it doesn't break the bloc's data protection laws. Google says it had briefed data protection agencies beforehand and had heard no substantial concerns then.
Feb. 28: France's regulator says a preliminary analysis finds that Google's new policy appears to violate European data-protection rules. The regulatory agency CNIL says Google's explanation of how it will use the data is too vague and difficult to understand "even for trained privacy professionals."
March 1: The changes take effect.