Facebook, as social media network, not only for business use but also for fun use. There are available about 200 games that you can play. From simple and fun game to a lil bit complicated game. Just pick from Application toolbar (At bottom left of Firefox bottom section).

Pet Society

In the world of Pet Society you and your pet can have a great time! You can play games, decorate your house and even bring gifts for your friends when you visit them. This game is so much fun, with a funny and colorfull character. Mostly mommy Facebooker, play this game.

Mafia War

Mafia War like a gangster organization. You can recruit as many as possible from friendlist.  You get money/point from crime job, buy weapon, and fight with another mafia.

Restaurant City

In Restaurant City you get to create and run your very own restaurant. Design it, decorate it, hire your friends to work in it, collect new ingredients and menu items and visit friends. Play a cute avatar manage the restaurant.

Bejeweled Blitz

Maybe you recognize this game from classic gems game on PC, and now created just for Facebook. Try out the new multiplier gems and speed bonuses. Compete against friends for bragging rights. Cooperate with friends for the chance to win prizes.

Yoville

Hang out with your friends and make new ones in YoVille. Dress in the latest fashions. Decorate with hip, fun furniture. Host a party, chat, play games, send messages or gifts, shop, earn coins at work. from its description we can say that this is fun and girly facebook game

Happy Facebooking ^_^v