However, for when I want to integrate with Kongregate, I doubt that webstorage will work. The plugin doesn't seem like it supports this and there is nothing in the manual about it...
EDIT: I suppose we set our statistic to 'max type' or something? This means we would have to be able to GET values from kongregate if we wanted, for instance, a 'highscore' variable in our game, e.g. if we wanted to apply an action if the player beats their high score.
So, I suppose the question ends up being "can/should I use webstorage in combination with Kongregate?"