by Jonnyd226

8 Add-ons in this Collection

Firebug by Joe Hewitt, Jan Odvarko, others

Rated 5 out of 5 stars 1,801 reviews

2,704,207 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 200 reviews

114,787 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.

Firefinder for Firebug by Robert Nyman

Rated 3 out of 5 stars 28 reviews

26,403 users

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

CodeBurner for Firebug by SitePoint

Rated 3 out of 5 stars 34 reviews

37,994 users

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

Pixel Perfect by Mike Buckley, Lorne Markham, others

Rated 4 out of 5 stars 101 reviews

16,449 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.

Inline Code Finder for Firebug by Robert Nyman

Rated 4 out of 5 stars 14 reviews

10,268 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

SenSEO by Nico Steiner

Rated 4 out of 5 stars 41 reviews

7,803 users

SenSEO is an extension checking the most important on-page-SEO-criteria and calculating a grade of how good your site fulfills these criteria.

FireRainbow by BinaryAge, Jan Odvarko

Rated 4 out of 5 stars 44 reviews

6,681 users

Javascript syntax highlighting for Firebug

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