Probably I'm not the first person to ask for this... Please make one folder for Bookmarks from which they'll be visible on toolbar and on mobile.
If I use mobile folder then I need to recopy all bookmarks to toolbar folder on desktop. And backwards when I use desktop toolbar.... I love this toolbar since Firefox 1.4 version which was my start with your wonderful browser and loved the future idea of synced files with mobile. But using on mobile bookmarks directly from desktop toolbar folder it's a bloody painful process reaching for every one, every time, starting at the same point. So the best solution is to simplified the process by making one folder for toolbar and mobile.