An anonymous reader writes "Opera 11 Beta has just been released and now includes support for extensions. Also new in this release Tab Stacking, Visual Mouse Gestures, performance improvements, new installer, and much more. Even with its many new features, Opera 11 is 30% smaller than Opera 10.60. That means that Opera downloads more quickly and installs in fewer steps. There are over 130 extensions and climbing including NoScript and AdBlock! Extensions can be found here."