I can drag and drop a URL or bookmark into a folder on the Bookmark Toolbar, but I cannot drop any bookmarks into subfolders as I can in Firefox or Chrome. This would be very handy.
Also, being able to right-click a Toolbar bookmark to edit it in place is a missing feature.
Drag the URL from the address bar or from elsewhere, such as the Bookmark Toolbar, into a folder on the Bookmark Toolbar, pause, and have the folder open so you can drop the bookmark into a sub-folder (continue for multiple folder depths).
Open a Bookmark Toolbar folder, right-click a bookmark to be able to rename/edit it, just as you can a top-level bookmark in the toolbar.