Tools & Webdev

by ycc2106

57 Add-ons in this Collection

Firebug by Joe Hewitt, Jan Odvarko, others

Rated 4 out of 5 stars 2,072 reviews

1,940,920 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...

Selenium IDE by Jason Huggins, Adam Goucher, others

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Experimental

Rated 3 out of 5 stars 21 reviews

118,814 users

Selenium IDE is an integrated development environment for Selenium tests. It is implemented as a Firefox extension, and allows you to record, edit, and debug tests.

FirePath by Pierre Tholence

Rated 4 out of 5 stars 24 reviews

94,491 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).

Web Developer by chrispederick

Rated 5 out of 5 stars 258 reviews

442,057 users

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

ColorZilla by Alex Sirota

Rated 4 out of 5 stars 327 reviews

242,865 users

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

SQLite Manager by lazierthanthou

Rated 4 out of 5 stars 65 reviews

193,192 users

Manage any SQLite database on your computer.

Tamper Data by Adam Judson

Rated 4 out of 5 stars 145 reviews

99,380 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

134,952 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

107,610 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 175 reviews

113,540 users

View JSON documents in the browser.

HttpFox by Martin Theimer

Rated 4 out of 5 stars 172 reviews

79,911 users

An HTTP analyzer addon for Firefox

YSlow by YSlow

Rated 3 out of 5 stars 220 reviews

68,378 users

YSlow analyzes web pages and suggests ways to improve their performance based on a set of rules for high performance web pages.
http://yslow.org is the official open source website.

XPath Checker by Brian Slesinsky

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Experimental

Rated 5 out of 5 stars 22 reviews

27,983 users

An interactive editor for XPath expressions.

Rainbow Color Tools by Heather Arthur

Rated 5 out of 5 stars 98 reviews

26,235 users

Color tools for web development.

Color picker and eyedropper + saving colors and trying out colors with drag and drop.

Firefinder for Firebug by Robert Nyman

Rated 3 out of 5 stars 28 reviews

18,653 users

Finds HTML elements matching chosen CSS selector(s) or XPath expression
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