Don't like having to wrestle with pop-up ads and similar intrusions when you're browsing the web on your iPhone? You might not have to when iOS 9 rolls around. Apple has quietly let slip that the operating system's version of Safari includes supportfor content blocking extensions, much like its Mac counterpart -- in other words, it can block ads. You only have to install an app with the right Safari extensions to make cookies, images, scripts and other unwanted material disappear. It's not certain how Apple will police apps with these add-ons, but it's feasible that at least some ad blockers will get approval.