Good news to developers - the new versions of Opera 9.5 and above will be shipped with develop tools installed - Dragonfly. It works similarly to how Firebug works, you can inspect DOM elements, update CSS on the fly, step through debugging break points, error console and more.

You can download Opera 9.51 from here. In Ubuntu, you will get a .deb package, download it to your home directory and then simply run the following command to install:



Restart Opera and you will see a new look:




To launch dragonfly:




Now you can step through CSS and Javascript:







With the release of IE8, which contains built-in web development tools, on the way, the life will be much easier for web developers.