The Journal found that ads on more than 20 of the top 100 websites, including YouTube, ehow.com, and AOL.com, placed the code on users' computers or iPhones—but there's no indication the sites themselves were aware of it. After the tracking technique went live, it let Google follow user activity on most websites. After the Journal contacted Google, the search giant disabled the code; three other online advertisers were also using the "workaround." Google said the Journal "mischaracterizes what happened and why. We used known Safari functionality to provide features that signed-in Google users had enabled," and the cookies don't "collect personal information."