To organize my bookmarks in a faster and more efficient way. I would like to be able to have 2 bookmark library windows open or the possibility to split the screen. So I can drag & drop bookmarks from one folder to another without having to cut/paste and to scroll from bottom to top or top to bottom (when having long lists of folders). I remember being able to do this a few years earlier with previous versions of firefox or netscape. Mustn't be that hard to have this possibility. No existing add-ons either.