Step 1: Open Settings
From the Fire TV Stick Home Screen, open Settings.
Step 2: Open the About Section
Go to My Fire TV → About.
Step 3: Enable Developer Options
Select your Fire TV Stick device name and press the OK/Select button 7 times on the remote until the message “You are now a developer” appears.
Step 4: Open Developer Options
Press the Back button and go to My Fire TV → Developer Options.
Step 5: Enable ADB Debugging
Select ADB Debugging and turn it ON.
Step 6: Enable Unknown App Installation
Open Install Unknown Apps or Apps from Unknown Sources, then enable it for the required application.
Step 7: Allow the Connection
When connecting the Fire TV Stick to your computer, an authorization prompt may appear. Select Always allow from this computer, if required, and then select Allow.
Step 8: Developer Mode Is Ready
Your Fire TV Stick is now ready for application installation and debugging.
