You can get Configuration Mania 1.14.2011022201 at mozilla-addons!

Browser->"Page control"->"Hardware acceleration"

Add Browser->Others->"Use tab modal dialog for alert()/prompt()/confirm()"

Classical style
Tab modal style

Browser->Tab Browsing->Animation

Open/Closing tab
Tab Groups (Panorama)
(browser.tabs.animate and browser.panorama.animate_zoom)

Browser->"Session Store"->"Number of concurrently restored tabs"

a new context menu item: 'Copy Preference Name'