|This article relies on references to primary sources. (September 2011)|
|Stable release||1.2012.12.14.1 / December 14, 2012|
|License||Apache License 2.0|
Using Opera Dragonfly for the first time requires an Internet connection to download Opera Dragonfly files. Then, Opera Dragonfly can be loaded offline from Opera's cache. Opera Dragonfly automatically updates to the latest version available, when connected to the Internet.
Opera Dragonfly is compatible with Presto 2.1 and later, specifically Opera Mobile 9.5 and above, Opera Desktop 9.5 and above, and Nintendo DS & Nintendo DSi Browser. The Scope transport protocol (STP) is used for communication between the Opera browser and Opera Dragonfly.
On 21 September 2011, the Opera Dragonfly team announced that from now on releases will be more focused on improvements to individual components, e.g. the DOM inspector or the UI framework. As soon as a feature for a certain component has been implemented, it will be put on the experimental path for some initial testing. As part of the new release strategy, they are also switching over Opera Dragonfly to a new version scheme: <major-version>.<year>.<month>.<date>.<today’s-build> 
See also 
- Web development tools
- Internet Explorer Developer Toolbar
- Firebug (web development)
- Web Inspector
- Chrome Developer Tools