I've had a stock, rooted Moto Droid 4 for years now and love the browser on it. Recently switched to the S4 and would love to have that Moto browser on it. I copied the apk from the Droid 4 and attempted to install it on the S4 but it won't go. It was a system app on the Droid 4, could that be what's flagging it? Any way to get it working?