 In version 9.5, in 2008, Opera introduced "Dragonfly", a debugging tool similar to Firebug and developer tools found in other browsers, that allows debugging of the HTML DOM, JavaScript, CSS, and more.A user can set breakpoints and watches, alter scripts on-the-fly, execute statements in the current environment from a console, and audit page resources and local storage.Opera Dragonfly also allows debugging from a personal computer a webpage opened on a handheld or other device.