gistfile1.txt

Node repl:
node> var object = {"2":"first","1":"second","3":"third"}
node> console.log(object)
{ '1': 'second', '2': 'first', '3': 'third' }
node>


Firebug console:
var object = {"2":"first","1":"second","3":"third"}
console.log(object);

Response:
Object { 2="first",  1="second",  3="third"}


Node sorts the object (2, 1, 3 becomes 1, 2, 3) instead of returning it as input.