Note: Fire TV devices are not fully compatible with all Android apps - some games and apps may not work as intended.
ニコニコPlayer【非公式】 is an Apk android app that was developed by binzume.net. It belongs to the Video Players & Editors genre. The latest version of is version 0.2.8_p1.KARI and the it requires 1.6 to run it. If your Firestick runs on a higher android version than this, you have nothing to worry about.