(Telecompaper) Facebook passed 1 billion active daily users in the third quarter, an increase of 17 percent year-on-year and up from 968 million in the previous quarter. Of the total, 894 million accessed the social network each day over a mobile device, up 27 percent from a year ago. Monthly active users rose 14 percent year-on-year to 1.55 billion at the end of September, including 1.39 billion mobile users. Advertising revenues from Facebook rose at an even faster rate of 45 percent in the third quarter, and mobile accounted for 78 percent of the USD 4.30 billion in ad revenues. Total revenues at the company increased 41 percent year-on-year to USD 4.50 billion, while operating profit was up only 4 percent to USD 1.46 billion, after a 68 percent increase in operating costs. Net profit rose 11 percent to USD 896 million, and adjusted earnings were up 33 percent to USD 0.57 per share. Facebook generated USD 1.41 billion in free cash flow in the quarter and finished the period with total cash of USD 15.83 billion.