As you probably well know, you can use Facebook as an instant messenger by sending in-browser IMs through Facebook itself. That’s great, but sending messages via a webpage isn’t exactly the best way to handle instant messaging.
FaceChat as the name gives us the idea is an in-browser Facebook chat extension that enables you to chat with your Facebook friends with ease. Once installed , Facebook icon will be displayed in upper right corner.
You simply need to login and simply start chatting without opening the Facebook.
After logging in, a list of online friends will be displayed in pop up. Now you can easily chat with them.
Get Facechat from there
Opera: Download Here