Now, with Opera 10.5, the folks at Opera once again claim that Opera is the "fastest browser on Earth>." We've covered the various development builds of Opera 10.5, but here's another rundown of the most important features in the final version of Opera 10.5.
Opera has increased room for content on your screen by replacing the menu bar with the menu button. The new version also integrates with Windows 7/Vista, letting you access your Speed Dials, tabs and other features diretcly from the taskbar.
Furthermore, Opera 10.5 features a new JavaScript engine, Carakan and a new graphics library called Vega. Both should improve browsing speed, with Carakan being as much as seven times faster than the Futhark JavaScript engine used in Opera 10.10. Finally, Opera's private browsing features allow you to browse privately either in a tab or a separate window.