Debug and edit CSS, HTML, and JavaScript on live web pages to test changes without reloading the whole page, integrated into the Opera web browser.
Opera Dragonfly is an integrated developer tools suite included in the Opera web browser. It provides web developers a set of tools to assist with debugging, editing, and analyzing web pages.
Some key features of Opera Dragonfly include:
Overall, Opera Dragonfly aims to provide web developers a versatile toolset alongside the browser to simplify many common web development tasks such as tweaking CSS, visualizing DOM structure, or diagnosing JavaScript issues.