Firebug Add-ons

by Jeff Balogh

14 Add-ons in this Collection

Firebug by Joe Hewitt, Jan Odvarko, others

Rated 5 out of 5 stars 1,799 reviews

2,256,333 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...

YSlow by YSlow

Rated 3 out of 5 stars 199 reviews

95,993 users

YSlow analyzes web pages and suggests ways to improve their performance based on a set of rules for high performance web pages. is the official open source website.

FirePHP by cadorn

Rated 4 out of 5 stars 47 reviews

49,376 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

CodeBurner for Firebug by SitePoint

Rated 3 out of 5 stars 34 reviews

32,668 users

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

Firefinder for Firebug by Robert Nyman

Rated 3 out of 5 stars 28 reviews

22,297 users

Finds HTML elements matching chosen CSS selector(s) or XPath expression

CSS Usage by Teun van Eijsden

Rated 4 out of 5 stars 38 reviews

21,045 users

Firebug extension to view which CSS rules are actually used.

Pixel Perfect by Mike Buckley, Lorne Markham, others

Rated 4 out of 5 stars 101 reviews

13,746 users

Pixel Perfect is a Firefox extension that allows web developers and designers to easily overlay a web composition with semi-transparent layers (images). These layers can be consequently used for per pixel comparison between the page and a layer.

FireQuery by BinaryAge, Jan Odvarko

Rated 4 out of 5 stars 52 reviews

29,401 users

Firebug plugin for jQuery development

Firecookie by Jan Odvarko

Rated 4 out of 5 stars 61 reviews

4,194 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

Inline Code Finder for Firebug by Robert Nyman

Rated 4 out of 5 stars 14 reviews

8,879 users

Inline Code Finder is an add-on to Firebug, to be able to find HTML elements with any of the below issues:

* Inline JavaScript events
* Inline style
* javascript: links

Detailed description can be found at

FireRainbow by BinaryAge, Jan Odvarko

Rated 4 out of 5 stars 44 reviews

5,857 users

Javascript syntax highlighting for Firebug

Validator by Teun van Eijsden

Rated 3 out of 5 stars 11 reviews

2,942 users

Firebug extension to validate HTML.

FireLogger by BinaryAge, Jan Odvarko

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Rated 3 out of 5 stars 10 reviews

1,595 users

Logging support for web developers (PHP, Python, ColdFusion)

Jiffy by Bill Scott

Rated 3 out of 5 stars 12 reviews

86 users

Adds a new panel to Firebug for displaying timing measurements for JavaScript applications.

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