San Francisco (AFP) – Amazon on Thursday predicted a slowdown in sales growth during the year-end holiday shopping season, sending shares in the e-commerce colossus tumbling. Sales could grow as little as 2 percent in the final three months of this year, the company said, crimped by a strong US dollar that makes products more expensive in other countries. Amazon shares plunged some 20 percent in after-market trades but regained some ground, down about 14 percent to $95.32 at 2130 GMT. The company nevertheless returned to profit in the third quarter after two consecutive quarters of losses, wit…