Can you at least give us a description of the capability in development? Is it going to be architecturally like a file explorer with automatic "bookmark" retention? Anything less will be just another failed attempt. In file explorer, the computer is ...
It is going to take an add-on developer like QuickSaver (TagGroupsMenu) or Piro (with TreeStyleTabs), or a forked version of Firefox like WaterFox to implement the functionality we are trying to recover for tab-groups-management. No browser has it. ...