Firefox Extension Development Addons

by Erik Vold

34 Add-ons in this Collection

Firebug by Joe Hewitt, Jan Odvarko, others

Rated 5 out of 5 stars 1,773 reviews

2,437,929 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 213 reviews

580,217 users

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

SQLite Manager by lazierthanthou

Rated 5 out of 5 stars 35 reviews

204,623 users

Manage any SQLite database on your computer.

RESTClient, a debugger for RESTful web services. by Chao ZHOU

Rated 4 out of 5 stars 82 reviews

150,048 users

Notice: some important features (XML indentation and load old saved requests) are missing in version 2.0.0, please update to version 2.0.1.

Please follow the link ("View other versions") below To install version 2.0.1.

Session Manager by Michael Kraft

Rated 4 out of 5 stars 555 reviews

277,393 users

Session Manager saves and restores the state of all or some windows - either when you want it or automatically at startup and after crashes. It can also automatically save the state of open windows individually.

ColorZilla by Alex Sirota

Rated 5 out of 5 stars 300 reviews

261,731 users

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

XPath Checker by Brian Slesinsky

Rated 5 out of 5 stars 18 reviews

29,071 users

An interactive editor for XPath expressions.

Quick Locale Switcher by ppclick

Rated 3 out of 5 stars 81 reviews

184,445 users

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

Rainbow Color Tools by Heather Arthur

Rated 5 out of 5 stars 93 reviews

37,435 users

Color tools for web development.

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

Add-on Compatibility Reporter by Mozilla

Help make Firefox better. The Add-on Compatibility Reporter enables you to report if the Firefox add-ons that you're using are working properly.

Restartless Restart by Erik Vold

Rated 5 out of 5 stars 180 reviews

44,344 users

This 15KB restartless add-on will add a "File" -> "Restart" menu item and a ctrl/cmd + alt + r hotkey to restart Firefox or Seamonkey.

DOM Inspector by SeaMonkey Council

Rated 5 out of 5 stars 63 reviews

136,690 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.

Extended Statusbar by Strahinja Kustudić

Rated 4 out of 5 stars 250 reviews

51,077 users

A Statusbar with speed, percentage, time and loaded size (similar to Opera's one)

Extension Auto-Installer by Wladimir Palant

Rated 5 out of 5 stars 13 reviews

3,733 users

Extension Auto-Installer is a helper for Firefox/SeaMonkey/Thunderbird extension developers: it allows automatically adding or updating browser extensions, e.g. via command line tools. This makes testing your changes easier.

Firecookie by Jan Odvarko

Rated 4 out of 5 stars 61 reviews

4,636 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
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