I made my Facebook account 5 year ago and since then I have been using it.in Facebook app, I noticed many problem like, first problem as I can notice when I want send massage any person than I can never send massage, because if I’m downloading massagener app, its not work. so third party app first problem.and second problem I notice , when I see video than ads between video and its not disable.last problem’s Facebook privacy, its most important part because all person wants that his privacy always save.so Facebook always leaks our data( privacy) .so its not secure.