Apple's newly launched macOS High Sierra may not be flashy on the outside, but there's plenty going on beneath the surface. Admittedly, some of its high-profile upgrades are easier to spot: Like Safari muting autoplaying videos by default. However, another modification to the browser could go unnoticed. As noted by TechCrunch, Safari is now quietly collecting your data. If you opt-in, Apple's differential privacy tech will gather your activity info in order to identify problematic websites. These are the types of murky domains that can debilitate the browser by using too much power, and can even cause it to crash by hogging memory. The tech giant plans to document the popularity of these sites to help it figure out which ones it should tackle first.