How to use THREE.GeometryUtils.center with a .obj model

Question

I am using THREE.OBJLoader for the obj import model. I use the code from https://github.com/mrdoob/three.js/blob/master/examples/webgl_loader_obj.html#L75 and I insert THREE.GeometryUtils.center to move the model to the original

var loader = new THREE.OBJLoader (); loader.addEventListener ('load', function (event) {

var object = event.content; for ( var i = 0, l = object.children.length; i < l; i ++ ) { object.children[ i ].material.map = texture; } object.position.y = - 80; scene.add( object ); }); THREE.GeometryUtils.center(object); loader.load( 'obj/001939.obj'); 

I am showing an error in firefox: "a.computeBoundingBox () is not working." I don’t know why to show an error. Iuse firfox version 17.0.1