Opera’s latest version brings a whole new way of managing tabs—a feature called “Tab stacking”. This feature gives tab management another dimension, as you are able to group tabs together in a stack. These grouped tabs can be handled like a single tab. Tab stacks can be expanded, collapsed and unstacked. For more about this feature, you can check out our preview of the beta build—it hasn’t changed feature wise since then.
Opera 11 is available to download for Windows, Linux and Mac OSX, from the Opera website. What’s more, the new version is also a 30 percent smaller file to download.

Another great feature in Opera 11 is extension support. Opera has added a new extension mechanism in this version that allows developers to add features to the browser. Additionally Opera users can now download extensions from the new Opera extensions web site hosted at addons.opera.com. Some popular browser extensions such as LastPass and YouTube video downloader and ad blockers are already available, and there are now hundreds of extensions for Opera fans to choose from.
This version also features changes to the address field, which aims to reduce the amount of unnecessary data shown, and give you information about your security and connectivity status in a single glance. The browser now also has a visual cuing system that helps you understand mouse gestures. Also, Opera now has a setting that allows you to change the default behavior of browser plugins, which can now be set to load on demand rather then automatically.