by Glenn CHAPMAN Agence France Presse SAN FRANCISCO, United States (AFP) — Facebook shares bounced Wednesday with word that profit more than doubled in the final quarter of last year, coming back down after a vow to spend heavily on the future. In earnings that topped most forecasts, Facebook said it made a net profit of $3.7 billion on revenue of $8.6 billion in the fourth quarter, as compared with profit of $1.6 billion on […]