Adds button/shortcut to return to the page from which you opened the current tab. Never forget where your tab came from again! Have you ever spammed undo-close-tab multiple times to figure out what you accidentally closed a while back? Not again, activate this extension to jump straight there! If origin page is already open, then we switch to that tab. Otherwise we open it in a new tab. You can even use it recursively on tabs opened by tab origin; the extension tracks the history. I suggest the shortcut is cmd/ctrl-shift-u, set from the bottom of Extensions page. When origin information is unavailable for a tab a "N/A" badge is shown. Port of my Tab Origin add-on from Firefox.