extdev

by dynamis

17 Add-ons in this Collection

Firebug by Joe Hewitt, Jan Odvarko, others

Rated 5 out of 5 stars 1,828 reviews

2,180,026 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...

JSONView by Ben Hollis

Rated 5 out of 5 stars 152 reviews

109,934 users

View JSON documents in the browser.

Pearl Crescent Page Saver screenshot tool by Kathleen Brade, Mark Smith

Rated 4 out of 5 stars 87 reviews

86,638 users

Save an image of a web page (including Flash content) to a file. Web page screenshots may be captured interactively or from the command line. Options allow you to control the output format (PNG or JPEG), image file name, scaling, and much more.

DOM Inspector by SeaMonkey Council

Rated 5 out of 5 stars 66 reviews

129,339 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.

Add-on Compatibility Reporter by Mozilla

Rated 4 out of 5 stars 213 reviews

69,866 users

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.

Nightly Tester Tools by Automation Development, Tony Mechelynck, others

Rated 4 out of 5 stars 191 reviews

30,621 users

Useful tools for the nightly tester.

Restartless Restart by Erik Vold

Download Now

Experimental

Rated 4 out of 5 stars 211 reviews

29,623 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.

View Source Chart by Jennifer Madden

Rated 5 out of 5 stars 110 reviews

13,349 users

Inspect the DOM at lightning speed.

Execute JS by Rudolf Noe

Rated 5 out of 5 stars 13 reviews

5,576 users

Execute JS is a enhanced JavaScript-Console, where you can comfortably enter and execute arbitrary JavaScript-Code and modify functions...

Console² by Philip Chee, zeniko

Rated 5 out of 5 stars 49 reviews

8,373 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.

Developer Assistant by Ted Mielczarek, Gavin Sharp, others

Rated 4 out of 5 stars 46 reviews

2,971 users

A suite of tools for developers.

Source Viewer Tab by Piro (piro_or)

Rated 4 out of 5 stars 34 reviews

1,993 users

Shows web page sources in tab.

QuickRestart by Juan Carlos Avila B.

Rated 4 out of 5 stars 123 reviews

1,488 users

Ever needed to restart Firefox after enabling or disabling an extension, switching to a new theme, or modifying configuration files (such as userChrome.css or user.js)?

This simple extension adds a "Restart Firefox" item to the "File" menu. You can ...

Mozilla Labs - Jetpack Prototype by Mozilla Labs

Rated 4 out of 5 stars 27 reviews

150 users

Jetpack Prototype is an experiment in making it easy to build Firefox add-ons using common web technologies.

xqjs by matyr

Rated 5 out of 5 stars 1 review

85 users

Simple JS console
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