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 
Gall offer Datblygwr Firefox ddadfygio dyfeisiau pell (Firefox Android a Firefox OS, er enghraifft). Gwnewch yn siŵr eich bod wedi cychwyn y dewis 'Dadfygio pell' ar y ddyfais pell. I gael rhagor o wybodaeth, gw. 