About this Collection
69 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).
View HTTP headers of a page and while browsing.
As of Firefox 33, Venkman *no longer works*, as the APIs which it needs have been removed.
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
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/
DOM Inspector is a tool that can be used to inspect and edit the live DOM of any web document or XUL application. The DOM can be navigated using a two-paned window displaying a variety of different views on the document and all nodes within.
Markdown document viewer.
Allows to visualize formatted markdown documents in browser.
Firebug extension to view which CSS rules are actually used.