Astral-devel pack

by Alexander Smirnov

104 Add-ons in this Collection

Firebug by Joe Hewitt, Jan Odvarko, others

Rated 4 out of 5 stars 1,937 reviews

1,972,539 users

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

User Agent Switcher by chrispederick

Rated 4 out of 5 stars 267 reviews

327,055 users

The User Agent Switcher extension adds a menu and a toolbar button to switch the user agent of a browser.

Web Developer by chrispederick

Rated 5 out of 5 stars 254 reviews

443,783 users

The Web Developer extension adds various web developer tools to the browser.

FirePath by Pierre Tholence

Rated 4 out of 5 stars 24 reviews

92,975 users

FirePath is a Firebug extension that adds a development tool to edit, inspect and generate XPath 1.0 expressions, CSS 3 selectors and JQuery selectors (Sizzle selector engine).

SQLite Manager by lazierthanthou

Rated 4 out of 5 stars 63 reviews

192,720 users

Manage any SQLite database on your computer.

Tamper Data by Adam Judson

Rated 4 out of 5 stars 143 reviews

99,566 users

Use tamperdata to view and modify HTTP/HTTPS headers and post parameters...

ColorZilla by Alex Sirota

Rated 5 out of 5 stars 316 reviews

247,971 users

Advanced Eyedropper, Color Picker, Gradient Generator and other colorful goodies...

Live HTTP Headers by Daniel Savard, Nikolas Co

Rated 4 out of 5 stars 172 reviews

135,748 users

View HTTP headers of a page and while browsing.

JavaScript Debugger by James Ross, Robert Ginda, others

Rated 4 out of 5 stars 49 reviews

106,801 users

As of Firefox 33, Venkman *no longer works*, as the APIs which it needs have been removed.

Venkman is the code name for Mozilla's JavaScript Debugger. Venkman aimed to provide a powerful JavaScript debugging environment for Mozilla based browsers.

JSONView by Ben Hollis

Rated 5 out of 5 stars 174 reviews

114,196 users

View JSON documents in the browser.

Wappalyzer by Elbert Alias

Rated 4 out of 5 stars 106 reviews

80,337 users

Wappalyzer is a browser extension that identifies software on websites.

MeasureIt by Kevin Freitas

Rated 4 out of 5 stars 360 reviews

131,196 users

Draw a ruler across any webpage to check the width, height, or alignment of page elements in pixels.

HttpFox by Martin Theimer

Rated 4 out of 5 stars 172 reviews

80,438 users

An HTTP analyzer addon for Firefox

SeoQuake SEO extension by SeoQuake Team

Rated 4 out of 5 stars 216 reviews

61,745 users

Accelerate your SEO efforts on the fly. SEOquake is a free plugin for browsers that provides you with key SEO metrics for a specific page, along with other useful tools such as SEO Audit and many others.

Selenium Expert (Selenium IDE) by Samit Badle

Rated 4 out of 5 stars 2 reviews

27,080 users

This plugin is my attempt to bring the wonderful world of inspections, tips, hints, fixes and refactoring to Selenese! The Selenium Expert goes through your selenium test cases suggesting improvements, giving tips and even lets you apply them.
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