There is a step-by-step procedure at the eHow link below. I do not use Yahoo Bookmarks, so I do not know if this works, but you can try. *IMPORTANT: **You might want to name the the file created in step 5 to "YahooBookmarks.html" instead of "bookmarks.htm" to distinguish it from other bookmark files on your hard drive **And put the file in a place/folder easy for you to find and remember **The imported Bookmarks will be inter-mingled with your existing Firefox Bookmarks and will be indistinguishable from your existing Firefox Bookmarks Import Yahoo Bookmarks into Firefox (eHow): https://www.ehow.com/how_8562961_import-yahoo-bookmarks-toolbar-firefox.html You may also want to backup your Firefox Bookmarks '''before''' doing the above, just in case something goes wrong: *[https://support.mozilla.com/en-US/kb/how-do-i-use-bookmarks?redirectlocale=en-US&redirectslug=Bookmarks#w_how-do-i-import-export-or-back-up-bookmarks Bookmarks-How do I import, export or back up bookmarks] '''''and''''' [http://kb.mozillazine.org/Backing_up_and_restoring_bookmarks_-_Firefox Backing up and restoring bookmarks (Mozillazine)] *Special Note: **JSON files (backup Bookmarks), when '''''restored''''', will over-write all your existing Firefox Bookmarks **HTML files (exported Bookmarks), when '''''imported''''', will add to your existing Firefox Bookmarks and '''''could''''' result in duplicates if the item is already in your Bookmarks and is also in the imported HTML file '''If this reply solves your problem, please click "Solved It" next to this reply when <u>signed-in</u> to the forum.'''

Many thanks! Very helpful.