Web Development

by Seán Hayes

14 Add-ons in this Collection

Firebug by Joe Hewitt, Jan Odvarko, others

Rated 5 out of 5 stars 1,906 reviews

2,052,218 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 252 reviews

457,986 users

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

ColorZilla by Alex Sirota

Rated 5 out of 5 stars 314 reviews

252,818 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 172 reviews

140,494 users

View HTTP headers of a page and while browsing.

YSlow by YSlow

Rated 3 out of 5 stars 217 reviews

72,464 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 48 reviews

39,823 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/

DOM Inspector by SeaMonkey Council

Rated 5 out of 5 stars 70 reviews

121,880 users

DOM Inspector is a tool that can be used to inspect and edit the live DOM of any web document or XUL application. The DOM can be navigated using a two-paned window displaying a variety of different views on the document and all nodes within.

View Source Chart by Jennifer Madden

Rated 5 out of 5 stars 110 reviews

11,605 users

Inspect the DOM at lightning speed.

XML Developer Toolbar by Scott Root II

Rated 4 out of 5 stars 9 reviews

4,335 users

The XML Developer's Toolbar!!...

Color Management by Seán Hayes

Rated 4 out of 5 stars 43 reviews

5,800 users

Provides a GUI front end for enabling color management in Firefox and Songbird.

GridFox by Eric Puidokas

Rated 4 out of 5 stars 18 reviews

3,995 users

Draws a grid on top of a website

View Dependencies by Florian QUEZE

Rated 4 out of 5 stars 35 reviews

3,897 users

View Dependencies adds a tab to the Page Info window, in which it lists all the files which were loaded to show the current page.

Console² by Philip Chee, zeniko

Rated 5 out of 5 stars 49 reviews

6,930 users

Console² (pronounced Console Squared or Console Two) replaces the JavaScript Console with what could be the next generation Error Console. From v0.5 includes the Console Filter extension previously available separately from the Console² website.

Inspect Context by max1million

Rated 5 out of 5 stars 17 reviews

1,102 users

Open Dom Inspector at this node from Inspect on context menu. Dom Inspector must already be installed. Handy for checking both page for web developers and chrome for extension...

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