In addition to multiple stacks tab and extension, 11 beta Opera browser also has a refined engine with support HTML5 help pages load faster. One of the most significant addition in Opera 11 beta is a system of "stack" tab, provides a way to organize multiple tabs in a browser window. Simply pull the tab through a different tab, and a stack is created and you can use to store dozens of tabs in a minimum amount of space. Icon expand / collapse appears next to the tab to be stacked, making a quick look at the contents of the stack easier. More simply, you can just hover over a stack of it to see the tab style Expose.

Also new is support for Opera 11 extensions, which add functionality to Opera like Firefox, Chrome and Safari. Opera also has integrated the new prediction search Google on your browser. When using the search options or search the address bar of Opera, the predictions of the Google search will appear instantly. 11 beta Opera browser engine also is refined with strengthening support HTML5, resulting in faster page downloads, web applications run "smoothly" over. The "plug-in only at the request" that the new plug-ins such as Flash will only be loaded when clicking on - a great way to increase your browsing speed.