well there is firesheep a firefox add on. not really meant for hacking facebook but can work its pretty self explanitory once you download just go to view go to side bar and click firesheep. you need a wifi connection other people use though. i did not yet use this and idk if i will but u can try.
i cant post links yet sry but it is first on google just search firesheep and the second one on google is the download if u need any help pm me