"It's time for Google to acknowledge that it can do a better job of respecting the privacy of web users," the EFF said in a statement, in which it warned: "Google, the time has finally come. You need to make a pro-privacy offering to restore your user's trust … it's time for a new chapter in Google's policy regarding privacy. It's time to commit to giving users a voice about tracking and then respecting those wishes."
The company may also be tracking people without their knowledge on other browsers, including those on its own Android phones, because those do not implement the same security restrictions as Apple does.
The circumvention, carried out by a small piece of code, meant that people could see messages indicating whether their associates in Google "Circles" on its Google+ social network had clicked on ads – but it also let Google and other advertisers see which websites people landed on.
Google declined to answer a Guardian request to say when it had begun the tracking.
The search giant insisted that a report in the Wall Street Journal, which first revealed the tracking, mischaracterised its actions, and that the users' identities had remained anonymous throughout – although they were signed in to Google's systems.
