"Quick Tabs" in Firefox

Internet Explorer 7 (IE7) for Windows XP+ only has been released in November 2006. Some have said the “Quick Tabs” is reason alone to use IE7. 
 Firefox already has had such a feature through add-ons: 
 Tab Catalog — https://addons.mozilla.org/firefox/1937/ 
 Has an option to disable the viewing of the tab catalog on button roll-over. The Tab Catalog button is a well-behaved toolbar element and can be placed where desired on the toolbar(s). 
 Firefox Showcase — https://addons.mozilla.org/firefox/1810/ 
 Very much like Quick Tabs. 
 Viamatic foXpose — https://addons.mozilla.org/firefox/1457/ 
 Also, very much like Quick Tabs. 
 Ctrl Tab Preview — https://addons.mozilla.org/firefox/2134/ 
 A bit different. Has a very Mac OS X feel to it. 
 As with most Firefox extensions, many options are available for a given extension/add-on. 
 It has been said, “If you are not using Firefox extensions, you are not using Firefox” .