Identified the device but can’t connect to Fire TV/Stick?

 You need a physical Fire TV/Stick Remote only for the first time to:

1. Allow Authorization (Check Always Allow option) 
2. Connect to the same Wi-Fi Network. 

Later, you won’t need any physical remote. 

Enable ADB: 

Step 1: 

To enable developer options on your Amazon Fire TV/Stick, open the “Settings Menu”, and navigate to “Device & Software / My Fire TV* › “About”. Select your device’s name 7 times, until you see “No Need, You Are Already a Developer.” 

Step 2: From the main screen of your Fire TV, select Settings. 

Step 3: Select Device & Software My Fire TV › Developer Options. 

Step 4: Turn on ADB Debugging.