Developer Tools

by Zulkarnain K.

52 Add-ons in this Collection

Remote XUL Manager by Jorge Villalobos

Rated 5 out of 5 stars 28 reviews

28,470 users

Manages the Remote XUL whitelist to allow websites and local files to load XUL content.

Extension Auto-Installer by Wladimir Palant

Rated 5 out of 5 stars 9 reviews

2,621 users

For extension developers: allows automatically adding or updating browser extensions, e.g. with command line tools.

JSONovich by mjgiarlo, Will Elwood

Rated 4 out of 5 stars 28 reviews

7,536 users

Pretty-prints JSON content in the browser for easy, unobtrusive viewing.

Console² by Philip Chee, zeniko

Rated 5 out of 5 stars 45 reviews

17,065 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.

JavaScript Terminal by Paul Rouget

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Experimental

Rated 5 out of 5 stars 4 reviews

6,978 users

JavaScript Terminal for Firefox.

User Style Manager by Girish Sharma

Rated 5 out of 5 stars 16 reviews

1,919 users

Easiest way to Add and Manage Custom User Styles in Firefox.
Add, Edit, enable, disable and delete in-numerous User Style Sheets to redesign the Firefox and the Web.

GitHub Extension Installer by Diego Casorran

Rated 5 out of 5 stars 4 reviews

760 users

Install Browser Extensions straight from GitHub Repositories

Foundstone HTML5 Local Storage Explorer by Foundstone Inc.

Rated 4 out of 5 stars 7 reviews

2,875 users

Foundstone HTML5 Local Storage Explorer allows for viewing, modifying and deleting of data items stored in the browser's LocalStorage. LocalStorage is a client side storage technology introduced in HTML5.

Execute JS by Rudolf Noe

Rated 5 out of 5 stars 13 reviews

7,029 users

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

Developer Assistant by Ted Mielczarek, Gavin Sharp, others

Rated 4 out of 5 stars 45 reviews

4,235 users

A suite of tools for developers.

CSSsir by Razum

Rated 5 out of 5 stars 15 reviews

3,332 users

CSSsir is easy and handy tool which allows you to generate cross-browser code for main CSS- rules in a few clicks.
This CSS3 generator will be useful not only for web-masters and designers but also for common users.

Markdown Viewer by Thiht

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Experimental

Rated 4 out of 5 stars 20 reviews

2,200 users

Markdown document viewer.
Allows to visualize formatted markdown documents in browser.

Magnifier by Girish Sharma, Paul Rouget

Rated 4 out of 5 stars 7 reviews

2,345 users

A quick restartless magnifier to debug styles and web pages.

Scriptify by Kris Maglione

Rated 4 out of 5 stars 17 reviews

1,632 users

Create and manage add-ons made from Greasemonkey and Scriptish user scripts

Javascript Command by max1million

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Experimental

Rated 4 out of 5 stars 12 reviews

4,723 users

For writing/testing javascript on Firefox windows (extension development, etc), web pages, and bookmarklets.
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