Efecto de Humo Diferente efecto en chrome que en Firefox, http://goo.gl/wegq9u
var _timer = setInterval(update, 1000)
var _box = document.getElementById('container');
function update(){
var _smokeDiv = document.createElement('div');
_smokeDiv.className = 'smoke';
_box.appendChild(_smokeDiv);
TweenMax.to(_smokeDiv,50,{ scale:((Math.random() * 50)+10), top:((Math.random() * 30)-500), left:(Math.random() * 300)-150,opacity:0, rotation:(Math.random() * 360)
});
var smoken=document.getElementsByClassName('smoke');
if(smoken.length>=60){
smoken[59].remove();
}
}