Web Developer Necessities

by rdoherty

11 Add-ons in this Collection

Firebug by Joe Hewitt, Jan Odvarko, others

Rated 5 out of 5 stars 1,791 reviews

2,215,748 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...

ColorZilla by Alex Sirota

Rated 5 out of 5 stars 305 reviews

294,326 users

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

Web Developer by chrispederick

Rated 5 out of 5 stars 217 reviews

557,130 users

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

MeasureIt by Kevin Freitas

Rated 4 out of 5 stars 338 reviews

153,016 users

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

Tamper Data by Adam Judson

Rated 4 out of 5 stars 132 reviews

113,795 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 157 reviews

169,462 users

View HTTP headers of a page and while browsing.

YSlow by YSlow

Rated 3 out of 5 stars 195 reviews

98,548 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.

Firefinder for Firebug by Robert Nyman

Rated 3 out of 5 stars 28 reviews

21,973 users

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

Pixel Perfect by Mike Buckley, Lorne Markham, others

Rated 4 out of 5 stars 101 reviews

13,952 users

Pixel Perfect is a Firefox extension that allows web developers and designers to easily overlay a web composition with semi-transparent layers (images). These layers can be consequently used for per pixel comparison between the page and a layer.

Firecookie by Jan Odvarko

Rated 4 out of 5 stars 61 reviews

4,496 users

Firecookie is an extension for Firebug that makes possible to view and manage cookies in your browser

Firecookie is part of Firebug since Firebug 1.10

FireRainbow by BinaryAge, Jan Odvarko

Rated 4 out of 5 stars 44 reviews

6,196 users

Javascript syntax highlighting for Firebug

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