The ActiveGS Chrome extension required to run the games on this site is broken, and the code hasn't been updated in two years:
https://chrome.google.com/webstore/detail/activegs/nhndampaj...
https://chrome.google.com/webstore/detail/activegs/nhndampaj...
Are you serious? Flash is being dropped eventually, npapi plugins (especially wrt Java) are out, the blink tag is gone, Firefox extensions are being dropped for a worse system, breaking changes to JavaScript, the list goes on.