A Firefox add-on that allows you to eliminate unnecessary truncation
Version: 3Places Full Titles eliminates unnecessary truncation of bookmarks' and history items' titles.
Operating System: Mac OS X
Places Full Titles allows you to leave space for sub-menus, menus that unfold vertically still have a size limit, but it's somewhat wider than usual.
This applies to the top-level Bookmarks and History menus, to any folder on the bookmarks toolbar, and to the bookmarks toolbar's overflow menu.