mood throwr lets you choose a smiley face for your mood on Facebook and than share your status with your friends.
In other words, the mood throwr extension lets you customize your Facebook account, by colorizing your browser`s top bars in the color associated with your mood.
Furthermore, mood throwr adds a menu for sharing your current mood and the status of your activity on Facebook.com.
If your friends also have installed the mood throwr extension, you can see their mood and activity information right in the Facebook stream.