Mozilla Firefox!- The Hackers Browser… The security testers or the hackers have a lot of tool to play around with . But what if Your browser helps you in this ?

The magical browser is Mozilla Firefox and the extensions/add-ons developed by the professional ethical hackers and penetration testers..

In this article I will tell you some of the best add-ons of all time that hackers use….

Download Firefox.

Now back to topic! 🙂

Mozilla add-ons for hackers

Contents at a glance

Social engineering add-on

People Search and Public Record

This Firefox extension is a very handy tool for investigators,hackers,legal professionals, and anyone interested in doing their own basic people searches and public record look ups as well as background research.

Google and Spider

Advanced dork 

Gives quick access to Google’s Advanced Dorks directly from the context menu. This could be used to scan for hidden files or narrow in a target anonymously.


Spiderzilla is an easy-to-use website mirror utility, based on Httrack.

There are also many other different tools often used by hackers & pen-testers during their assessment & analysis.



The ’view page source’ menu item now opens files based on the behavior you choose in the jsview options. This allows you to open the source code of any web page in a new tab or in an external editor..


Firebug integrates with Firefox to put a wealth of development tools at your hand while you browse. You can edit, debug, and monitor CSS, HTML, and JavaScript live in any web page

XML Developer Toolbar

Allows XML Developer’s use of standard tools all from your browser.

Headers manipulation and agent switcher


This is Firefox extension for display on status-bar panel any HTTP response header of top level document returned by a web server. Example: Server (by default), Content-Encoding, Content-Type, X-Powered-By and others.


Control what gets sent as the HTTP Referrer on a per-site basis.

User Agent Switcher

Adds a menu and a toolbar button to switch the user agent of the browser

Cookies manipulation/editors

Add N Edit Cookies

Cookie Editor that allows you add and edit “session” and saved cookies.


Adds httpOnly cookie support to Firefox by encrypting cookies marked as httpOnly on the browser side


Dumps ALL cookies (including session cookies) to Firefox standard cookies.txt file

Security Tools


This toolbar will help in testing sql injections, XSS holes and site security.This tool will not help you to exploit the vulnerability or to learn hacking. Its main purpose is to help a hacker do security audits on his code.

Tamper Data

Tamper data to view and modify HTTP/HTTPS headers and post parameters.


Chickenfoot is a Firefox extension that puts a programming environment in the browser’s sidebar so you can write scripts to manipulate web pages and automate web browsing

These were the few of Mozilla addons for testing vulnerabilities. Read more on best vulnerability scanners that can be used for efficient pentesting.

Proxy utilities


POW (Plain Old WebServer)

The Plain Old Webserver uses Server-side Javascriptto run a server inside your browser. Use it to distribute files from your browser. It supports Server-side JS, GET, POST, uploads, Cookies, SQLite and AJAX. It has security features to password-protect your site. Users have created a wiki, chat room and search engine using SJS.


FoxyProxy is an advanced proxy management tool that completely replaces Firefox’s proxy configuration. It offers more features than SwitchProxy, Proxy Button etc


SwitchProxy lets you manage and switch between multiple proxy configurations quickly and easily. You can also use it as an anonymizer to protect your computer from prying eyes.

Proxies are often used for the sake of anonymity. Read more on how to stay anonymous while hacking…



Allows you to customize the way a webpage displays using small bits of JavaScript.scripts could be download at user scripts.

Right said, Firefox is indeed, the hackers browser!

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