Webdev

by Stéphane Mourey

21 Add-ons in this Collection

Firebug by Joe Hewitt, Jan Odvarko, others

Rated 4 out of 5 stars 2,446 reviews

1,081,229 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 4 out of 5 stars 405 reviews

280,886 users

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

ColorZilla by Alex Sirota

Rated 4 out of 5 stars 401 reviews

172,011 users

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

MeasureIt by Kevin Freitas

Rated 4 out of 5 stars 354 reviews

79,161 users

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

View Source by Baris Derin

Rated 5 out of 5 stars 7 reviews

7,297 users

View Source button to easily open up View Source tab for the web page.

Firefinder for Firebug by Robert Nyman

Rated 3 out of 5 stars 28 reviews

12,275 users

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

Quick Locale Switcher by ppclick

Rated 3 out of 5 stars 87 reviews

176,846 users

Allows you to quickly switch to a different language (User Interface, Spell Checker Dictionary and Website content) in your Mozilla application.

Screengrab by Andy M

Rated 4 out of 5 stars 575 reviews

10,326 users

Screengrab! saves webpages as images... but not for new versions of Firefox.

FF changes too fast and I don't have the time to maintain it anymore. Bugs have developed that I am not in a position to investigate.

Therefore, Screengrab is EOL.

YSlow by YSlow

Rated 3 out of 5 stars 208 reviews

31,302 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.

FirePHP by cadorn

Rated 4 out of 5 stars 54 reviews

17,199 users

Log from PHP to a devtools panel.

CSS Usage by Teun van Eijsden

Rated 4 out of 5 stars 40 reviews

8,134 users

Firebug extension to view which CSS rules are actually used.

CodeBurner for Firebug by SitePoint

Rated 3 out of 5 stars 35 reviews

14,560 users

CodeBurner is a Firefox add-on that integrates with Firebug, to extend it with reference material for HTML and CSS.

IE Tab + (FF 8+, 7, 6, 5, 4, 3.6, 3.5, SeaMonkey) by IE Tab Pro

Rated 3 out of 5 stars 84 reviews

33,462 users

IE Tab + is an enhanced version of IE Tab. It supports FF 3.5 or greater, integrates IE Tab with Adblock Plus in the IE Tab engine, and synchronizes cookies between IE and Firefox. You can easily import settings from the original IE Tab into IE Tab +

Firecookie by Jan Odvarko

Rated 4 out of 5 stars 57 reviews

1,017 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

SenSEO by Nico Steiner

Rated 4 out of 5 stars 43 reviews

2,423 users

SenSEO is an extension checking the most important on-page-SEO-criteria and calculating a grade of how good your site fulfills these criteria.
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