Apple has announced that it will completely block 3rd-party cookies, a significant milestone that surpasses Chrome’s efforts. It’s Intelligent Tracking Prevention will block all third party cookies and allow access to cross-site cookies only for services and features that a user has opted in to. These could include payment preferences, subscriptions and commenting widgets. This way, users will still be able to use payment methods like PayPal while blocking all other third party cookies from advertising sites, which the user might not want tracking them from site to site. So, if a user is signed to FB or PayPal, the services associated with those first party sites will be able to perform as normal. However, any third party sites that the user has not opted into will be blocked. In these cases, a pop-up will be generated asking users to sign in and complete whatever task they are trying to do. Apple mentioned the three key benefits of this feature: It disables cross-site request forgery attacks against websites through third-party requests. It removes the ability to use an auxiliary third-party domain to identify users. It simplifies things for developers. If you need cookie access as a third-party, use the Storage Access API. Google doesn’t have any plans to fully block all third-party cookies until 2022, as its earnings depend on third-party cookies to facilitate behavioral advertising.