The Verge argues that Apple’s decision to block third-party ad trackers in Safari will only serve to strengthen the already dominant positions of Google and Facebook.“The crucial distinction is between the first-party sites you’re purposefully visiting and the third-party trackers that come along for the ride,” it writes. “As long as a cookie is associated with a website you’ve visited in the last 24 hours, Safari won’t change much -- which gives popular sites like Facebook and the various Google services an easy way around the new restrictions.”