F.B. Purity is a browser extension / addon that lets you clean up and customise Facebook. It filters out the junk you don't want to see, leaving behind the messages and page elements you do wish to see. The list of message types that FBP hides is customisable to your taste.
Better Facebook is a free browser extension that improves the Facebook site by adding lots of great enhancements and functionality. It runs in most browsers and installs in just a minute.