Development

by a.bronx

13 Add-ons in this Collection

Firebug by Joe Hewitt, Jan Odvarko, others

Rated 4 out of 5 stars 2,090 reviews

1,421,121 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 270 reviews

304,995 users

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

MeasureIt by Kevin Freitas

Rated 4 out of 5 stars 362 reviews

97,964 users

Draw a ruler across any webpage to check the width, height, or alignment of page elements in pixels.

Add-on Compatibility Reporter by Mozilla

Rated 4 out of 5 stars 191 reviews

67,387 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.

CodeBurner for Firebug by SitePoint

Rated 3 out of 5 stars 35 reviews

14,717 users

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

HTTP/2 and SPDY indicator by Cheng Sun, Brandon Siegel

Rated 4 out of 5 stars 25 reviews

29,336 users

An indicator showing HTTP/2 and SPDY support in the address bar.

View Source Chart by Jennifer Madden

Rated 5 out of 5 stars 109 reviews

7,100 users

Enables accelerated human processing of DOM

Octotree by Buu Nguyen

Rated 5 out of 5 stars 18 reviews

2,749 users

Add-on to display GitHub code in tree format

JSON-DataView by Warren Bank

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Experimental

Rated 5 out of 5 stars 12 reviews

1,765 users

Displays JSON data in a collapsible tree structure with syntax highlights.

Gmail S/MIME by Sean Leonard of SeanTek®, Richard Jones

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Experimental

Rated 3 out of 5 stars 48 reviews

1,700 users

Send and receive signed and encrypted messages in Gmail.

Regular Expressions Tester by Sebo

Rated 4 out of 5 stars 26 reviews

3,036 users

Testing tool for regular expressions with color highlighting (including submatches) and helpers for creating expressions

OAA Accessibility Extension by Jon Gunderson

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Experimental

Rated 5 out of 5 stars 2 reviews

344 users

Testing and demonstration of the the features of the OpenAjax Alliance (OAA) Accessibility Evaluation Library API, Rules and Rulesets for evaluating web content for compliance with requirements of the W3C WCAG 2.0 Success Criteria.

Workspace by robcee

Rated 4 out of 5 stars 3 reviews

70 users

A simple editor for executing snippets of JS.

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