Firebug

Firebug is a web development tool integrated into the Firefox browser that allows developers to inspect, analyze, and debug websites directly within the browser. It provides detailed views of a webpage’s HTML, CSS, and JavaScript, enabling users to identify and fix issues, experiment with code changes in real-time, and optimize performance. Essentially, Firebug acts like a window into a website’s inner workings, making it easier for developers to understand how a site functions and ensure it runs smoothly. Although now deprecated in favor of modern tools, it was a popular resource for web debugging.