Ah, Opera! My favourite browser has been recently update to version 11. There are lots of new beautiful features, like Presto 2.7 engine, improved HTML5 support, tab stacking, mouse gestures visualisation, smart address field, Extensions and much more. Opera 11 has been officially out for just two weeks, and there are already 300 Extensions (also known as "Add-ons" in Firefox and (surprise!) "Extensions" in Chrome) available!