Q:

Firebase: Update key?

{ 
    43268jfjn7983-347983:
    {
         title: 'hello world', 
         time: '1000'
    } 
}

As above, I just want to update 43268jfjn7983-347983 to something else, is this possible in firebase?

A:

There is no way to change the key of an existing node. 
So instead I'd go for:
var ref = new Firebase('https://my.firebaseio.com/');
var child = ref.child('43268jfjn7983-347983');
child.once('value', function(snapshot) {
  ref.child('somethingElse').set(snapshot.val());
  child.remove();
});

