Tools & Webdev

by ycc2106

57 Add-ons in this Collection

Firebug by Joe Hewitt, Jan Odvarko, others

Rated 5 out of 5 stars 1,807 reviews

2,277,841 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

Download Now

Experimental

Rated 5 out of 5 stars 1 review

36,301 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.

Web Developer by chrispederick

Rated 5 out of 5 stars 222 reviews

539,052 users

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

SQLite Manager by lazierthanthou

Rated 5 out of 5 stars 43 reviews

205,262 users

Manage any SQLite database on your computer.

FirePath by Pierre Tholence

Rated 4 out of 5 stars 22 reviews

76,709 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).

Tamper Data by Adam Judson

Rated 4 out of 5 stars 134 reviews

113,841 users

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

JavaScript Debugger by James Ross, Robert Ginda, others

Rated 4 out of 5 stars 50 reviews

126,541 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.

ColorZilla by Alex Sirota

Rated 5 out of 5 stars 306 reviews

290,116 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 164 reviews

166,077 users

View HTTP headers of a page and while browsing.

HttpFox by Martin Theimer

Rated 4 out of 5 stars 166 reviews

96,234 users

An HTTP analyzer addon for Firefox

JSONView by Ben Hollis

Rated 5 out of 5 stars 141 reviews

107,605 users

View JSON documents in the browser.

YSlow by YSlow

Rated 3 out of 5 stars 201 reviews

94,296 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.

RefControl by James Abbatiello

Rated 4 out of 5 stars 181 reviews

86,845 users

Control what gets sent as the HTTP Referer on a per-site basis.

XPath Checker by Brian Slesinsky

Rated 5 out of 5 stars 19 reviews

28,948 users

An interactive editor for XPath expressions.

FirePHP by cadorn

Rated 4 out of 5 stars 48 reviews

48,355 users

FirePHP enables you to log to your Firebug Console using a simple PHP method call.

Not using Firebug 1.9+ on Firefox 8+? See http://firephp.org/
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