I don't understand that Firefox shows me a great start page with my recent visited pages with thumbnails but my bookmarks are still an obscure text list.

I've searched for an extension that would turn the bookmark sideboard into a full page with thumbnails but I haven't found one. (And I am too lazy to start such a project. I also assume that the Firefox team will light up a turn the bookmarks sideboard into something like the start page.)

Adding an option to store a copy of the page in the bookmark would make this a great usability enhancement.