Opera posted strong results in the third quarter, showing signs of improvement in the struggling digitaladvertising market. Shares of Opera (OPRA 10.08%) soared as much as 16.7% higher on Tuesday, goosed by a fantastic earnings report. The Norwegian maker of security-oriented web browsers and other online safety tools beat analyst expectations across the board and offered a bullish-guidance update for the full year. Opera's stock cooled down to a gain of 10.1% at the market close, but that's still a firm 52 ...