I know, I know - unclose isn't a word. But it should be. We've all done it - accidentally closed the wrong tab. It's a minor inconvenience, as it's usually not too difficult to navigate through your history to find the page you had been on. But it should be easier, and now it is.

Undoclosetab is a Firefox extension that adds a right-click option to do just that - unclose a closed tab. That's all. Cool, eh?

[Via LifeHacker]