There was some effort in the past to allow browsers to provide desktop app-like experiences for webapps. Progressive Web Apps are doing similar, though the targ

There was some effort in the past to allow browsers to provide desktop app-like experiences for webapps. Progressive Web Apps are doing similar, though the target is very strongly toward mobile. It would be more efficient for disk space, though likely not CPU/RAM, to just make webapps be able to work more like desktop apps.