In a sense Microsoft forgot its own learnings. Because of exactly things like this they prevent UWP apps from connecting to localhost by default and make it very annoying to circumvent and from my experience, the circumvention is not exactly a stable setup. So they really don't want you to do that, and somebody thought enough to make it extra difficult. So, they have UWP, all those well thought-out policies, then make an editor ecosystem out of web technology and throw everything out of the window. No surprise from a $T company with more teams than countries on Earth that not everything is coordinated, but they should have a guy with the required knowledge and sensibilities on any major product team. Apps installed from their "store" are relatively safe, but then they put a (extension) store inside their app again, which is unsafe :/