As a stepgap for Firefox, I found that TabMarks fills that purpose. It keeps working spaces (windows) synced with tab folders. There's one mismatch though - cl

As a stepgap for Firefox, I found that TabMarks fills that purpose. It keeps working spaces (windows) synced with tab folders. There's one mismatch though - closing a window clears a space. To save it for later, I switch to an empty workspace first.