
Description: Opera Dragonfly is a developer tools suite integrated into the Opera web browser. It allows web developers to debug and edit CSS, HTML, and JavaScript on live web pages to test changes without reloading the whole page.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Firefox Developer Tools are a set of web developer tools built into Firefox browser to allow debugging, editing, and profiling web pages and applications. They include features like the Page Inspector, JavaScript Debugger, Network Monitor, Accessibility Inspector, Storage Inspector, and more.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API