Firebug extension to view which CSS rules are actually used.
RAMBack will cause Firefox to issue an internal notification to free up memory that is otherwise held for performance purposes. Additional items will be hooked into this notification in the future.
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.
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.
Just a simple extension to highlight links in a page according to nofollow / dofollow status.
SenSEO is an extension checking the most important on-page-SEO-criteria and calculating a grade of how good your site fulfills these criteria.
Oxygen style for Firefox!
Consistent and coherent integration with KDE!
Provides CPU usage and memory usage graphs on the toolbar.
Provides quick access to some web-based tools to help with search engine optimization. Quickly check inbound links, PageRank, http headers, and much more. Right-click on an open area of a web page, or use the included toolbar.
Collections are groups of related add-ons that anyone can create and share.Explore Collections