Tired of middle-clicking on the last tab in Thunderbird, only to have nothing happen?
This simple add-on embraces the industry-standard middle-click behavior adopted by Internet Explorer, Chrome, and even Firefox (versions 31 and up). Middle-click on that last tab to close either the tab or the window--it's up to you!
Your last Thunderbird tab will cower in fear, nevermore immune from the wrath of your middle-click!
As of 0.0.2:
The checkbox preference is not guaranteed to work in anything older than Firefox 12 (because the Add-on SDK is so new??). Core functionality, however, seems to work in Firefox 7 and up - you'll just have to adjust the about:config preference by hand.
This extension merely restores the default behavior of Firefox 3.6 regarding tab-middle-click.
Firefox 4-6 get no love...