Fennec debug servers accept remote connections only intermittently. STR: 1) Configure fennec for remote debugging 2) Attempt to connect from, for example, OS X debugger client (or any TCP client) 3) If successful, perform some other operations on the phone (change active application, allow screen to lock, etc). 4) Observe some connections (usually initial, and some subsequent) are accepted, others fail

cc'ing lucas for some fennec love.

This is essentially the "expected" behavior. Fennec will tear down the debugger socket when the app is closed / killed by Android, which can happen for various reasons. I don't believe we would have an easy way to keep it alive beyond these kind of events.