ReferenceError: webkitIDBTransaction is not defined

I'm getting this error in IE11 and Firefox 45.0.1 when trying this demo code:

var store = new Lawnchair({table:'pda'}, function(obj) {
    console.log(obj);
});

store.save({key:'config', company:'A Company'});

I'm including indexed-db adapter. it only happens when you save !

ERROR:
ReferenceError: webkitIDBTransaction is not defined
 indexed-db.js:71:14
