Hello everyone, dear friends!
In today's article, I have collected for you 12 best extensions for the FireFox browser, which will be useful for both beginners and experienced hackers.
Let's move on to the TOP!
KNOXSS
KNOXSS is a popular tool developed by Brazilian security researcher @Brutelogic. The tool is designed to search for cross-site scripting vulnerabilities.

The tool is distributed in two versions: Community Edition, which can be used for free, and a paid Pro version, with some add-ons.
addons.mozilla.org
Hackbar
When hacking a web application or web server, we often change the address bar settings and refresh pages many times. The Hackbar add-on will help you save time and quickly complete these tasks.

The hacker extension Hackbar will help in testing SQL injections, XSS, LFI, in assessing WAF and overall site security.
addons.mozilla.org
addons.mozilla.org
FoxyProxy
The FoxyProxy extension simplifies the process of changing connection settings in Firefox. It will help you quickly switch between proxy servers. FoxyProxy can compile a list of the most frequently used proxy servers and switch between them with one click.

addons.mozilla.org
DotGit
DotGit is an extension for checking the presence of git/.svn/.hg folders on the site. The tool will help you find unprotected files .env, security.txt and much more. View .git / config with one click of the mouse. Excellent tool, I recommend!


A very useful browser add-on for testing web applications.
addons.mozilla.org
ModHeader
The ModHeader add-on helps to quickly change HTTP headers. With this add-on, you can find various vulnerabilities on the site, such as bypassing authorization, modifying cookies, manipulating session data, etc.

You can create multiple profiles and add different values to the modified headers. All changes can be applied to a single tab or the entire site.
Beautifier & Minify
With this add-on, you can easily minify and simplify CSS, HTML, and JavaScript code. During penetration testing, we often come across a large chunk of JavaScript code that is sometimes difficult to understand. This hacker extension for Firefox can minify the code and turn it into a readable format, which will increase the chances of finding a vulnerability on the site.



addons.mozilla.org
Fake Filler
The purpose of this extension is to make it easier and faster to fill out forms with generated fake data.

addons.mozilla.org
Click-jacking
This addon helps find clickjacking vulnerabilities by finding the absence of the X-Frame-Options header on a website.
For those who don't know, Clickjacking is an attack that tricks website users into unintentionally clicking on malicious links.

Clickjacking is when hackers embed malicious links into buttons or other elements of website pages.
addons.mozilla.org
Cookie Editor
Cookie-Editor helps to work with cookies. The user can change, delete, add cookie values. With this add-on, you can test vulnerabilities such as session theft, privilege escalation, incorrect session configuration, etc.

addons.mozilla.org
Conclusion
That's all. I hope that the tools discussed in the article will help you earn money in our difficult times
In today's article, I have collected for you 12 best extensions for the FireFox browser, which will be useful for both beginners and experienced hackers.
Let's move on to the TOP!
KNOXSS
KNOXSS is a popular tool developed by Brazilian security researcher @Brutelogic. The tool is designed to search for cross-site scripting vulnerabilities.

The tool is distributed in two versions: Community Edition, which can be used for free, and a paid Pro version, with some add-ons.
KNOXSS Community Edition â Get this Extension for ð¦ Firefox (en-US)
Download KNOXSS Community Edition for Firefox. Tool for XSS (Cross-Site Scripting) discovery.
Hackbar
When hacking a web application or web server, we often change the address bar settings and refresh pages many times. The Hackbar add-on will help you save time and quickly complete these tasks.

The hacker extension Hackbar will help in testing SQL injections, XSS, LFI, in assessing WAF and overall site security.
Max HacKBar â ÐагÑÑзиÑе ÑÑо ÑаÑÑиÑение Ð´Ð»Ñ ð¦ Firefox (ru)
Загрузить Max HacKBar для Firefox. This hackbar moded by Mr bipolar
HackBar â Get this Extension for ð¦ Firefox (en-US)
Download HackBar for Firefox. A HackBar for new firefox (Firefox Quantum). This addon is written in webextension and alternatives to the XUL version of original Hackbar. Press F12 to use HackBar
FoxyProxy
The FoxyProxy extension simplifies the process of changing connection settings in Firefox. It will help you quickly switch between proxy servers. FoxyProxy can compile a list of the most frequently used proxy servers and switch between them with one click.

FoxyProxy Standard â ÐагÑÑзиÑе ÑÑо ÑаÑÑиÑение Ð´Ð»Ñ ð¦ Firefox (ru)
Загрузить FoxyProxy Standard для Firefox. FoxyProxy is an open-source, advanced proxy management tool that completely replaces Firefox's limited proxying capabilities. No paid accounts are necessary; bring your own proxies or buy from any vendor. The original proxy tool, since 2006.
DotGit
DotGit is an extension for checking the presence of git/.svn/.hg folders on the site. The tool will help you find unprotected files .env, security.txt and much more. View .git / config with one click of the mouse. Excellent tool, I recommend!

User-Agent Switcher
Allows you to quickly change the browser's user agent. When communicating with a web server, your browser sends a string of text, or HTTP header, called the User Agent, which contains information about the user's operating system, current browser, rendering engine, and other important components. Based on the user agent, servers respond to the user.
A very useful browser add-on for testing web applications.
User-Agent Switcher and Manager â ÐагÑÑзиÑе ÑÑо ÑаÑÑиÑение Ð´Ð»Ñ ð¦ Firefox (ru)
Загрузить User-Agent Switcher and Manager для Firefox. Spoof websites trying to gather information about your web navigation—like your browser type and operating system—to deliver distinct content you may not want.
ModHeader
The ModHeader add-on helps to quickly change HTTP headers. With this add-on, you can find various vulnerabilities on the site, such as bypassing authorization, modifying cookies, manipulating session data, etc.

You can create multiple profiles and add different values to the modified headers. All changes can be applied to a single tab or the entire site.
Beautifier & Minify
With this add-on, you can easily minify and simplify CSS, HTML, and JavaScript code. During penetration testing, we often come across a large chunk of JavaScript code that is sometimes difficult to understand. This hacker extension for Firefox can minify the code and turn it into a readable format, which will increase the chances of finding a vulnerability on the site.

Retire.js
Retire.js can detect the version of JS used on a site and find current vulnerabilities in the JavaScript library.
Email Extractor
The tool allows you to extract and save email addresses of visited pages. A useful tool, often used in social engineering and brute force.
Email Extractor â ÐагÑÑзиÑе ÑÑо ÑаÑÑиÑение Ð´Ð»Ñ ð¦ Firefox (ru)
Загрузить Email Extractor для Firefox. Automated Email Extraction Tool which extracts email addresses from web pages and AutoSaves them to use anytime.
Fake Filler
The purpose of this extension is to make it easier and faster to fill out forms with generated fake data.

Fake Filler â ÐагÑÑзиÑе ÑÑо ÑаÑÑиÑение Ð´Ð»Ñ ð¦ Firefox (ru)
Загрузить Fake Filler для Firefox. A form filler that fills all form inputs (textboxes, textareas, radio buttons, dropdowns, etc.) with fake and randomly generated data. The purpose of this extension is to help developers and testers test forms quickly and easily.
Click-jacking
This addon helps find clickjacking vulnerabilities by finding the absence of the X-Frame-Options header on a website.
For those who don't know, Clickjacking is an attack that tricks website users into unintentionally clicking on malicious links.

Clickjacking is when hackers embed malicious links into buttons or other elements of website pages.
Click-jacking â ÐагÑÑзиÑе ÑÑо ÑаÑÑиÑение Ð´Ð»Ñ ð¦ Firefox (ru)
Загрузить Click-jacking для Firefox. Adds a red border to all webpages vulnerable to click-jacking and missing X-Frame-Options header
Cookie Editor
Cookie-Editor helps to work with cookies. The user can change, delete, add cookie values. With this add-on, you can test vulnerabilities such as session theft, privilege escalation, incorrect session configuration, etc.

Cookie-Editor â ÐагÑÑзиÑе ÑÑо ÑаÑÑиÑение Ð´Ð»Ñ ð¦ Firefox (ru)
Загрузить Cookie-Editor для Firefox. Cookie-Editor lets you efficiently create, edit and delete a cookie for the current tab. Perfect for developing, quickly testing or even manually managing your cookies for your privacy.
Conclusion
That's all. I hope that the tools discussed in the article will help you earn money in our difficult times