Web Developer Necessities

by rdoherty

11 Add-ons in this Collection

Firebug by Joe Hewitt, Jan Odvarko, others

Rated 5 out of 5 stars 1,759 reviews

2,537,919 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...

Web Developer by chrispederick

Rated 5 out of 5 stars 203 reviews

636,649 users

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

Tamper Data by Adam Judson

Rated 4 out of 5 stars 127 reviews

124,692 users

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

ColorZilla by Alex Sirota

Rated 5 out of 5 stars 300 reviews

281,676 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 153 reviews

188,951 users

View HTTP headers of a page and while browsing.

MeasureIt by Kevin Freitas

Rated 4 out of 5 stars 327 reviews

161,722 users

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

YSlow by YSlow

Rated 3 out of 5 stars 180 reviews

122,973 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

26,030 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 99 reviews

15,051 users

Pixel Perfect is a Firefox/Firebug extension that allows web developers and designers to easily overlay a web composition over top of the developed HTML.

Firecookie by Jan Odvarko

Rated 4 out of 5 stars 61 reviews

5,468 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 43 reviews

7,643 users

Javascript syntax highlighting for Firebug

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