year, month, day, author, editor, entrytype, title, booktitle, journal, school in ascending or descending order (see blog entry). Now it is also possible to sort bookmarks by date and title. For example if you want to sort all your own bookmarks with the tag localization by title in ascending order, you just need to use the URL parameters sortPage and sortPageOrder.
With sortPage you can control whether you want to sort by title (sortPage=title) or date (sortPage=date). With sortPageOrder you can control whether you want to sort in ascending (sortPageOrder=asc) or in descending (sortPageOrder=desc) order.