While I was sleeping, my telephone finished all of my internet data limit. Then it passed to extra tariff and finished it too. I controlled which program is finished that data. It is firefox and finished all these data in background. There are no video, no music, nothing which can consume this enormous data is open at tabs. I'm using smart phones for years, and it is the first time that happen to me. Now I have no internet for the next 25 days :) What can be the solution for this, and whom fault it is?