Still getting error area after following instructions :"(
Try clearing your cookies and restarting Chrome. If it still doesn't work then it may not work anymore. It's been a long time since I've played on DMM using it, but it did work at the time.
You do not need any extension, just pick japanese as language on their site instead of english.. then use goodle translate to navigate to the game, lot more details here: http://millenniumwaraigis.wikia.com/...n,_Now_What%3F