Alongside the open source Firefox and Microsoft's Internet Explorer Opera is the third big web browser.
Quelle: PC Games Hardware
Just like the rival browsers, the Windows version is free and is continually enhanced. Furthermore it is also available for other platforms. Opera impresses with high speed and almost full support of all current web standards.
Of course Opera offers tabbed browsing, which allows to open multiple websites in a single window. Additionally there are other features like mouse gestures, voice control and an integrated Pop-Up-Blocker. Download version 9.51 right here. See the changelog to receive information about the adjustments.