Recently Closed от Jim Thomas

A Firefox extension that merges Recently Closed Tabs and Recently Closed Windows into a single, time-ordered list in a toolbar popup. The 5 most recent closed items are shown inline. Windows show how many tabs they contained (e.g. 5 tabs). Hovering a closed window shows a floating tooltip, anchored just below the row, listing every tab name in that window. Everything older is hidden behind a See all toggle. Clicking any item restores it.