Private Session Saver от NotJohn

Private Session Saver lets you manually save the tabs from the current Firefox private window as a named session and reopen any of the saved sessions later in a new private window.

Firefox requires Run in Private Windows to be enabled for this add-on before it can access private-window tabs.

What it does:
- Saves tabs only from the current private window
- Reopens a saved session in a new private window
- Saves only restorable http, https, and ftp URLs
- Does not save any session data like cookies
- Lets you delete saved sessions at any time
- All saved data stays local on the device