If your Device Manager shows an Other Devices section with a second Fire device with a yellow alert sign, your computer is listing Amazon's unrecognized ADB module as a separate device. You can manage devices via USB or IP address. Fire up the Terminal (Command Prompt on Windows) and check that your device is connected to ADB using the following command: adb devices.
Adblink device unauthorized Menu For rooted Lollipop devices: SELinux set to permissive with external drive mounts.