A frozen Fire Stick is usually caused by memory overload. Try these steps.
- Restart the Fire Stick
Hold Select + Play/Pause. - Unplug for 30 Seconds
Resets the device. - Clear App Cache
Settings → Applications → Manage Installed Applications. - Delete Unused Apps
Free up space. - Update Fire OS
Settings → My Fire TV → About. - Factory Reset
Last resort.
Conclusion:
These steps fix most freezing issues quickly.