Friend Mapper for Facebook uses open source data collection to gain information on Facebook profiles. Next the software performs some exiciting wizardry and provides you with the requested map of the data. Dec 16, 2018 Want the inside scoop on who is friends with whom on Facebook? Here's how to do the same using Facebook Friends Mapper! (step-by-step) In the last blog, we talked about how to hide your friends on Facebook so that you can enjoy better privacy. But apparently, if you want to view someone's friend list, there are ways to do that.