Close last tab with middle-click is an easy-to-use Firefox add-on that embraces the industry-standard middle-click behavior adopted by Internet Explorer and Chrome (and yes, Firefox 3.6, with some tweaking).
Close last tab with middle-click enables you to middle-click on that last tab to close either the tab or the window.
Close last tab with middle-click is cross-platform and it works on Mac OS X, Windows and Linux.
· Firefox 12.0 and later
What's New in This Release: [ read full changelog ]
· Updated to use Add-ons SDK version 1.13.2, which "includes an important fix in memory consumption".