I'm sure someone else tested already but
the browser does work, and the only way they could patch the joycons thing is well, they likely would be best going down the route of pushing a update for the firmware on the joycons themselves, which there isn't as far as I have seen, all the update on the switch itself could do is check what colors are available and reject joycons not of the available colors, though this forces users to update to use new controllers and some might not have much internet access leaving them screwed if they can't update and get new colors of joycon