We had already told you that Facebook has introduced new Chat style in its Interface, in new style you will get a new long sidebar at the right side of your screen, its quite long and useless.
Many users had complained that they are not liking it and want the old and classic chat interface back on there account.
Well here is the way to get old chat interface back in Opera, Google Chrome and Mozilla Firefox, all you need to do is install the extensions from below link according to your browser and you will get old look back.