About this Collection
This collection includes ALL extensions avaible for Firebug and be updated frequently. Updates not listed on addons.mozilla.org will be shown in a blog-entry soon.
28 Add-ons in this Collection
FirePath is a Firebug extension that adds a development tool to edit, inspect and generate XPath 1.0 expressions, CSS 3 selectors and JQuery selectors (Sizzle selector engine).
CodeBurner is a Firefox add-on that integrates with Firebug, to extend it with reference material for HTML and CSS.
Finds HTML elements matching chosen CSS selector(s) or XPath expression
YSlow analyzes web pages and suggests ways to improve their performance based on a set of rules for high performance web pages.
http://yslow.org is the official open source website.
Simple color picker plugin for Firebug.
Collector's Note A color picker which lets you change CSS-color-values with a single click. It has a very nice color picker with live-preview. It surpasses the pretty basic FirePalette by far. Love it.
FirePHP enables you to log to your Firebug Console using a simple PHP method call.
Not using Firebug 1.9+ on Firefox 8+? See http://firephp.org/
Collector's Note This is a tool for everyone who doesn't want to use one of the PHP debuggers, but wants more comfort than echo() gives you. You just include a .php-file and can output anything to a log-console with a simple fb($var, 'Label'). There are also a lot of advanced options like redirecting Exceptions or group logging-messages. It saves a great amount of time and eliminates the need of debug-divs in your homepages.
Firebug extension to view which CSS rules are actually used.
Pixel Perfect by Mike Buckley, Lorne Markham, others
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.
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
Collector's Note Makes editing, creating and deleting cookies as easy as possible. It's one of the more mature Firebug extensions.
SenSEO is an extension checking the most important on-page-SEO-criteria and calculating a grade of how good your site fulfills these criteria.
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