“Safari is already doing the same for years.” Indeed, and like the article points out, the ANA and IBA just haven't been paying attention. From the article: “B

“Safari is already doing the same for years.” Indeed, and like the article points out, the ANA and IBA just haven't been paying attention. From the article: “By default, Safari blocks third-party cookies, and has since its 2003 debut. The iOS version of Safari has done the same since its 2007 inception.” By my calculations, there are a lot more devices running Safari than there are running Firefox: There are 1.25 billion desktops and notebooks in use. According to NetApps Market Share, 17.3% of those use Firefox (216 million), 5.42% use Safari (68 million). There are 400 million iOS devices, all of those have Safari. So Safari is installed on twice as many computing devices than Firefox is. Now, total time spent browsing on desktops vs mobile is not equal, but it's getting there, especially as tablets become dominant. This conclusion is reached by the author of the article, as well: “In the last 12 months, mobile's share of all browser usage has almost doubled, climbing from 7.2% to 13.2%. At that pace, mobile browsing will account for 20% of the total by the end of April 2014.”