Amazon announces Fire OS 6 based on Android 7.1.2 Nougat
Well, among the Nougat's TV-related features supported on Fire OS 6, there's PiP (picture in picture), content recording and time-shifting APIs, which allows users to pause, rewind, or fast-forward live content.
Obviously, Fire OS 6 includes all other new features and improvements offered by Android Nougat, although it's yet unclear whether or not it comes with multi-window support as well.
Currently, the only device to come with Fire OS 6 on board, the 4K Fire TV can be pre-ordered from Amazon for $69.99, but the device won't ship until October.
source: Amazon via AndroidPolice
Things that are NOT allowed: