I need to rebind <kbd>Ctrl</kbd>+<kbd>Shift</kbd>+<kbd>T</kbd> to Open Previously Closed Tab, after toggling the option to Disable Firefox's built-in keyboard shortcuts, pressing <kbd>Ctrl</kbd>+<kbd>Shift</kbd>+<kbd>T</kbd> doesn't Open previously closed tabs, and I want to rebind this on <kbd>Ctrl</kbd>+<kbd>Shift</kbd>+<kbd>T</kbd> again, but there's no option in the Tab Actions, and can't be set in the Custom Action commands because the option to set that isn't showing. I can Restore Last Window, but that doesn't open previously closed tabs, this only opens windows that have been previously opened.
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