Fx: Web developer tools

by Archaeopteryx

58 Add-ons in this Collection

HttpRequester by Tom Mutdosch

Rated 4 out of 5 stars 38 reviews

45,768 users

A tool for easily making HTTP requests (GET/PUT/POST/DELETE), viewing the responses, and keeping a history of transactions.

Custom User-Agent String by Arpit Kumar

Set custom User-Agent string. Also available for Firefox on Android.

Toggle JS by dbyrne

Rated 5 out of 5 stars 8 reviews

4,730 users

A simple toolbar button to quickly toggle javascript between enabled or disabled.
A green shield is shown when javascript is enabled and a red shield is shown when it is disabled

SQL Inject Me by Security Compass

Download Now


Rated 4 out of 5 stars 13 reviews

15,447 users

SQL Injection vulnerabilites can cause a lot of damage to a web application. A malicious user can possibly view records, delete records, drop tables or gain access to your server. SQL Inject-Me is Firefox Extension used to test for SQL Injection vuln...

X-Forwarded-For Header by Jakob Landbo

Rated 4 out of 5 stars 8 reviews

16,339 users

Inserts X-Forwarded-For field into the HTTP header

XSS Me by Security Compass

Download Now


Rated 4 out of 5 stars 16 reviews

10,999 users

Cross-Site Scripting (XSS) is a common flaw found in todays web applications. XSS flaws can cause serious damage to a web application. Detecting XSS vulnerabilities early in the development process will help protect a web application from unnecessary...

HTTP UserAgent cleaner by fdsc

Rated 4 out of 5 stars 22 reviews

1,576 users

Hinder tracking in internet and allows you to disable unsafe ciphers in https TLS/SSL. Evaluates the strength of the TLS (https) encryption with full log for find weak pages (in version >

Header Tool by loreii

Rated 3 out of 5 stars 15 reviews

3,749 users

Open in a sidebar or in a tab and write headers directly. Simplicity, JS substitution, built-in functions, encryption, and regexp support.
You can easy modify header on each HTTP call on the Mozilla Firefox.

HTTP Tool by Robert Byrne

Not yet rated

1,472 users

Submit http requests with varying headers, bodies etc

fxdpi by Daniel Seither

Rated 5 out of 5 stars 1 review

120 users

Switch between HiDPI and normal mode with one click

Remote Control by pmorch, Robert Xiao

Download Now


Rated 5 out of 5 stars 5 reviews

2,428 users

Remote control the browser by executing any Javascript (e.g. forcing a page reload) from a TCP socket, e.g. from a script.

This allows you to refresh the browser from your IDE, or to automate tests.

CSSsir by Razum

Rated 5 out of 5 stars 18 reviews

2,775 users

CSSsir is easy and handy tool which allows you to generate cross-browser code for main CSS- rules in a few clicks.
This CSS3 generator will be useful not only for web-masters and designers but also for common users.

LastPage by Little Spark

Rated 5 out of 5 stars 5 reviews

600 users

Reading Firefox internal pages below content.

+ Error Console
+ Restore Session
+ Troubleshooting Information
+ View Cookies
+ View Downloads
+ Manage About:Config…
+ Manage Add-ons…
+ Manage Library…
+ Manage Search Engines…

Profilist by Noitidart

Rated 4 out of 5 stars 24 reviews

1,910 users

Inlays a simple and quick access profile manager into the new panel-based main menu. Designed for the Australis update to Firefox.

FireBreak by Filip Johansson

Rated 4 out of 5 stars 12 reviews

3,319 users

The easiest way to find the break points in your responsive designs.
  1. 1
  2. 2
  3. 3
  4. 4
Results 115 of 58

What are Collections?

Collections are groups of related add-ons that anyone can create and share.

Explore Collections

More by this User

See all collections by this user

Recently Viewed