ForgetMeNot is a Safari plug-in which remembers the tabs and windows you have opened when you quit Safari, and reloads those same windows and tabs when you restart Safari. It also adds an "Unclose Window" command to Safari's file menu: if you close a Safari window accidentally, you can click "Unclose Window" to bring that window back. The latest release adds “Unclose Window” to Safari’s file menu; if you accidentally close a window, you can “Unclose Window” to bring the closed window back. This version also allows you to “Undo Close Tab.”