My son plays games on crazygames.com, which saves his game progress. Even though he is logged into the site, his game progress is cleared when it is necessary to clear the Firefox cache for troubleshooting purposes (I had to clear it a couple of days ago to get a password reset done on another site). Is there a way to restore the website history to get his game progress back? Or can I exclude this website so the cache does not get cleared? This has become very frustrating :(