Opera. Made for your computer. Download the fast and free alternative web browser. Opera 43 is a major reinvention for Opera. Going forward, the browser's source code will be based on Chromium and Blink, a fork of the WebKit rendering engine. Everything for this browser is new: new rendering engine based on WebKit, new user interface, new capabilities, new features, improved site compatibility. As Opera has recreated its desktop browser, features will be introduced selectively and iteratively