Complex sentence: Opera 11 was released on December 16,2010 with new features including extensions, tab stacking, visual mouse gestures, improvements to the address field with the aim to make it safer and content blocker list now can be synchronized through Opera Link.
Split into simpler sentences: Opera 11 was released on December 16,2010 with new features including extensions, tab stacking, visual mouse gestures, and safety improvements to the address field. In addition, the content blocker list now can be synchronized through Opera Link.