Multi Purpose Hacking/ Pentesting Tools

What is Firebug?
Firebug is a free and open-source web browser extension that currently works on Firefox and Chrome. Although not stictly speaking a ‘hackers tool’, Firebug helps the penetration tester understand how certain technologies and systems works and therefore he or she is able to find holes that might be able to be exploited.

Is Firebug Free?
Yes, Firebug is free.

Does Firebug Work on all Operating Systems?
Works on Linux, Microsoft Windows and MAC OS X.

What are the Typical Uses for Firebug?
If you are unfamiliar with Firebug then consider it as a tool to check for bugs and checking CSS, HTML, DOM, XHR, and JavaScript. Firebug can also accurately analyze network usage and performance which has a huge benefit for most cybersecurity professionals.