As I understand Firfox Sync Service will store user data on its personal servers, i have 2 doubts then - 1: If a user stores his passwords to Firfox server and there is a security breach on that server and User's private data has gone to wrong hands then who would take responsibility of such incidence? How secure is the server that firfox uses in general !! 2: Once this data store grows in size, Firfox would have to use better and reliable technology, that comes with a cost tag, so would Firfox start charging those users who have no idea of this right now?