Use WebIDE to debug Webapps on device over WIFI

WebIDE over WIFI is default disabled now, but you can enable it in four steps:

1. Turn on the developer menu: connect the phone to your PC via USB and execute ./edit-prefs.sh under B2G folder. Append user_pref("devtools.remote.wifi.visible", true); to the end and save the file.

2. There will be a DevTools via Wi-Fi checkbox under Settings/Developer after reboot. Your phone can be discoverable after turn on this option.

1. Turn on the capability on Firefox Nightly: open about:config and change the devtools.remote.wifi.scan to true.

1. Open WebIDE and you’ll see WIFI Devices in the Select Runtime menu. Your device should be appeared under this category if it’s in the same local network.