[crazyhatfish]

At the moment, nothing in a browser is direct access. Everything is abstracted, which includes the filesystem and geolocation. This provides a layer of security against massive horrible bugs in the OS. With WebUSB there seems to be very little abstracting, all the values you pass to it are then sent on to the device. Small bugs once protected by numerous layers of security usually requiring superuser abilities are now made massive as they are connected to one of the largest fuzzers there is, the internet.