Opera has released its first Chromium-based, completely re-engineered browser as a preview for Windows and Mac systems (download). The new browser has been given quite a makeover and comes with a refresh of Opera's 'Speed Dial' bookmarking feature. Users can now not only organize their shortcuts into folders, but also group them into folders automatically by simply dragging one bookmark over another. Opera has also included a faster bookmarking tool dubbed 'Stash,' allowing users to return to the links quickly. The new version has combined its search and address bars, allowing users to make searches directly via Amazon, Bing, Google and Wikipedia."