I'm not sure what you mean by importing into the directory... In order to import the HTML file into Firefox, open the Library dialog (Ctrl+Shift+b) and use the toolbar button "Import and Backup" to get to the Import feature. (If you are showing only icons and not icons and text, it's the star with the little green arrows on the front.) This article has the steps: [[Import Bookmarks from a HTML file]]. After importing, the bookmarks may be in a folder named Imported Bookmarks on your Bookmarks Menu or under Unsorted Bookmarks. You can switch between these categories in the left column of the Library dialog. Any luck getting them into the correct locations?

See also: *http://kb.mozillazine.org/Sorting_and_rearranging_bookmarks_-_Firefox *https://support.mozilla.org/kb/Sorting+bookmarks *https://support.mozilla.org/kb/bookmark-folders-organize-your-bookmarks