A user reported last week that his or her imported bookmarks were all filed under the "Unsorted Bookmarks" category. Could you check there? It should be at the bottom of the left column in the Library dialog.

thanks but NO - I went up to Bookmarks, 5th dropdown menu item "Unsorted Bookmarks" but nothing happens - nothing shows

Did you try a search in the Bookmarks Manager (Library) for some know bookmarks?

Problems with bookmarks and history not working properly can be caused by a corrupted places.sqlite database file.

You can check for problems with the places.sqlite database file in the Firefox profile folder.

• http://kb.mozillazine.org/Bookmarks_history_and_toolbar_buttons_not_working_-_Firefox
• https://support.mozilla.org/kb/Bookmarks+not+saved#w_fix-the-bookmarks-file

thanks - your 2nd site appears very helpful - will dig into both tomorrow and revert. All I know right now is that the whole Bookmarks section does not appear to function at all - can't even bookmark a specific page I am on!!