I use adblock plus myself and have used it to disable some facebook junk. In the adblock plus options you can select "just this page" or something along the same lines so that facebook still functions, but it remembers that next time that same unwanted feature triggers it will be blocked.
I use to play games on facebook, but gave up on them. My biggest complaint is that to have a game full screen its like pulling teeth as for the stupid facebook ad clutter is always trying to intrude on the display space. I found though that right-clicking on the game app you can sometimes get them to run in their own window and then this way you maximize that window and the ads are all gone etc. However the games that FB has I have learned are fun at the beginning and then all of them are designed to progress further you need to have a supporting group of people, and this has given me a distaste for FB games. Some games you just want to solo play and noy have to get 5 friends in on it and then levels down the road you need another 5 people to join etc.