Debugger Softwares and Apps

Fiddler is a free web debugging proxy that logs HTTP(S) traffic between your computer and the Internet. It allows you to inspect and modify traffic, set breakpoints, mock responses, and analyze performance. ...more

Opera Dragonfly was a comprehensive suite of web development tools built into the Opera web browser. It provided developers with capabilities for debugging JavaScript, inspecting and editing the DOM and CSS, analyzing network activity, and much more, aiding in the development and optimization of web pages directly within the browser environment. ...more