Can I clear cookies upon closing LibreWolf and then have it reopen previous tabs upon startup? As I understand it, activating the “Delete cookies and site data when LibreWolf is closed” option also triggers the “Clear history when LibreWolf closes” setting, preventing LibreWolf from restoring the previous session upon startup.
Why is Session Restore not working? Session restore will not work unless you preserve your browsing history. However, LibreWolf deletes history on shutdown by default. If you want to use session restore, set your browser to not delete history, via settings or overrides.
Source: https://librewolf.net/docs/faq/#why-is-session-restore-not-working