Firefox Developer Tools can debug remote devices (Firefox for Android and Firefox OS, for example). Make sure that you have turned on the ‘Remote debugging’ option in the remote device. For more, see the 
Firefox 开发者工具可以调试远程设备（例如 Firefox for Android 和 Firefox OS）。请确保您开启了远程设备中的“远程调试”选项。更多信息请参阅