Web Developer Necessities
11 Add-ons in this Collection
Firebug by Joe Hewitt, Jan Odvarko, others
Advanced Eyedropper, Color Picker, Gradient Generator and other colorful goodies...
The Web Developer extension adds various web developer tools to the browser.
Draw a ruler across any webpage to check the width, height, or alignment of page elements in pixels.
Use tamperdata to view and modify HTTP/HTTPS headers and post parameters...
View HTTP headers of a page and while browsing.
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.
Finds HTML elements matching chosen CSS selector(s) or XPath expression
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
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