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 2,089 reviews

2,050,792 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...

FirePath by Pierre Tholence

Rated 4 out of 5 stars 24 reviews

102,389 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).

User Agent Switcher by chrispederick

Rated 4 out of 5 stars 268 reviews

331,515 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 260 reviews

464,036 users

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

SQLite Manager by lazierthanthou

Rated 4 out of 5 stars 68 reviews

201,439 users

Manage any SQLite database on your computer.

ColorZilla by Alex Sirota

Rated 4 out of 5 stars 344 reviews

254,407 users

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

Tamper Data by Adam Judson

Rated 4 out of 5 stars 145 reviews

103,773 users

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

Live HTTP Headers by Daniel Savard, Nikolas Co

Rated 4 out of 5 stars 172 reviews

141,213 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

111,111 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 176 reviews

121,097 users

View JSON documents in the browser.

HttpFox by Martin Theimer

Rated 4 out of 5 stars 172 reviews

84,621 users

An HTTP analyzer addon for Firefox

MeasureIt by Kevin Freitas

Rated 4 out of 5 stars 360 reviews

138,257 users

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

Wappalyzer by Elbert Alias

Rated 4 out of 5 stars 107 reviews

86,309 users

Wappalyzer is a browser extension that identifies software on websites.

SeoQuake SEO extension by SeoQuake Team

Rated 4 out of 5 stars 216 reviews

64,621 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

29,149 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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