Another option for people who don't have additional mouse buttons is to install addons for mouse gestures, such as Gesturefy [1]. You can then bind undo close t

Another option for people who don't have additional mouse buttons is to install addons for mouse gestures, such as Gesturefy [1]. You can then bind undo close tab, next/prev tab, and others to a mouse gesture, allowing you to do those actions without button hunting on the screen. [1] https://addons.mozilla.org/en-US/firefox/addon/gesturefy/ https://addons.mozilla.org/en-US/firefox/addon/gesturefy/