The tab grouping feature seems like it would be useful for me. It would be nice if the groups/pages were saved as folders/bookmarks so it could be retrieved later. They never mentioned what happens when FF was closed. And also if they could display the bookmarks/folders in the same fashion.

I am NOT interested in them looking into what pages I go to or my searches so they can direct ads or price search results. Data sharing should only be to people I know AND approve in advance.