Web Developer Toolbox

by Mozinet

25 Add-ons in this Collection

Firebug by Joe Hewitt, Jan Odvarko, others

Rated 5 out of 5 stars 1,755 reviews

2,430,230 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 202 reviews

644,725 users

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

ColorZilla by Alex Sirota

Rated 5 out of 5 stars 300 reviews

283,076 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 152 reviews

189,082 users

View HTTP headers of a page and while browsing.

MeasureIt by Kevin Freitas

Rated 4 out of 5 stars 327 reviews

162,017 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 176 reviews

122,150 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.

Font Finder by Ben Dodson, Eric Caron, others

Rated 4 out of 5 stars 62 reviews

32,845 users

FontFinder is created for designers, developers and typographers. It allows a user to analyze the font information of any element on a page, copy any piece(s) of that information to the clipboard, and perform inline replacements to test new layouts.

Rainbow Color Tools by Heather Arthur

Rated 5 out of 5 stars 90 reviews

39,770 users

Color tools for web development.

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

Html Validator by Marc Gueury

HTML Validator is a Mozilla extension that adds HTML validation inside Firefox and Mozilla. The number of errors of a HTML page is seen on the form of an icon

For Firefox 23+, you need 0.958 (under review)
http://users.skynet.be/mgueury/mozilla

CodeBurner for Firebug by SitePoint

Rated 3 out of 5 stars 33 reviews

42,202 users

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

View Cookies by Edwin Martin

Rated 4 out of 5 stars 40 reviews

29,477 users

It adds a tab to the Page Info dialog box, which shows the cookies belonging to the current page.

Dust-Me Selectors by brothercake

Rated 4 out of 5 stars 71 reviews

17,176 users

Dust-Me Selectors is development tool to remove unused CSS selectors.

Firepicker by thedarkone2

Rated 5 out of 5 stars 53 reviews

24,036 users

Simple color picker plugin for Firebug.

Split Pannel by max1million

Rated 4 out of 5 stars 63 reviews

8,431 users

Open panel to left, bottom or right (left,middle or right click) with current URL from Split on context menu (right click on page) of the tab's page.

Extended Copy Menu (fix version) by Oleksandr

Rated 5 out of 5 stars 18 reviews

4,542 users

Provides the option to copy selection as plain text or html.
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