Apple is including a feature to iOS 9 that will allow developers to write an extension that will block mobile ads and more. While the tech titan didn’t mention this during WWDC, a user will be able to pick up an add-on for Safari from the App Store. Installing this extension will allow users to block ads, cookies and other content from websites viewed on an iPhone or iPad. With 90% of Google’s revenue coming from mobile ads, this could be construed as a shot across the bow with Apple hitting Google right where it hurts. The majority of Google’s mobile ad revenue comes from ads viewed on iPhones and iPads.