Mr. Zuckerberg predicted that the company would eventually make more money on every minute spent on the Facebook mobile app than on the desktop computer.

Facebook reported fourth-quarter revenue of $1.59 billion, compared with $1.52 billion predicted by analysts surveyed by Bloomberg. The company earned $64 million in net income, or 3 cents a share. Excluding certain items, Facebook said it had a net income of $426 million in the fourth quarter, or 17 cents a share, beating analysts’ expectations by 2 cents.

Facebook’s biggest, long-term challenge remains how to profit from the enormous piles of personal data of its one billion users without alienating them or inviting the wrath of government regulators in the United States and abroad. The company reported on Wednesday that it had 1.06 billion active users — those who log in at least once a month.

Secondarily, it must figure out a way to profit abroad. Most of its revenue still comes from North America and to a lesser extent Europe.

Despite the stock’s decline after the earnings report, it is still much recovered since last year’s slump. It opened at $38 a share last May, but shortly after that, the stock plummeted as Wall Street soured on its ability to increase profit as fast as investors wanted. Shares sank to half the public offering price last September.

But the company focused on its advertising business and released a series of new products aimed at taking on some of its biggest rivals, including Google and Apple. Mr. Zuckerberg took the initiative to reassure investors it had their interests at heart. The improvement in the share price in recent weeks suggests that the company’s charm offensive is paying off.