A Statusbar with speed, percentage, time and loaded size (similar to Opera's one)
Make your browsing experience faster by avoiding wait time on DNS lookups
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.
Simulate WAP browsing by viewing WML (Wireless Markup Language) pages.
Defragments your Firefox "Places" database (history/bookmarks)
This greatly reduces the lag while typing in the address bar and the start-up time.
This extension features configurable automatic cleaning, periodic reminder, and internationalization.
Allows to run Maintenance tasks on the database that drives Places, the bookmarks and history module behind Firefox.
Firebug extension to view which CSS rules are actually used.
WooRank provides a deep SEO & Website Analysis reviewing more that 50 SEO criterias.
Easy cache status & management from status...
Replace the default "Print" button with the Mozilla Suite style "Print/Print Preview" toolbar button/menu...
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.