Design, develop, maintain and search web pages even more elegant and agile: • sketch • script • validate • debug • analyze • optimize • monitor • compare • grab • record • look up.
Multi Links lets you open, copy or bookmark multiple links at the same time rather than having to do them all individually.
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.
Show the IP address of the current page in the status bar. It also allows querying custom information services by IP (right click) and see location and avaiable vouchers for shopping sites. Additionally you can copy the IP address to the clipboard.
Monitors web pages for updates. Useful for websites that don't provide Atom or RSS feeds.
Dust-Me Selectors is development tool to remove unused CSS selectors.
Display the Google PageRank, Alexa rank, Compete ranking and SEOmoz Linkscape mozRank anywhere in your browser, along with fast keyword density analyser, keyword/nofollow highlighting, backward/related links, canonical links, WHOIS, robots and more.
Easy cache status & management from status...
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
Quickly test out your web pages in Internet Explorer, Chrome, Safari, or Opera. Open With opens the current page in your other browsers with just one click. Add Open With to your menus, toolbars and developer toolbox today!
Checks the (whole) web page (and not the text inside edit box) for spelling mistakes and highlights it.
Pixel Perfect is a Firefox/Firebug extension that allows web developers and designers to easily overlay a web composition over top of the developed HTML.
Bring back your personal and powerful Firefox Button!
Collections are groups of related add-ons that anyone can create and share.Explore Collections