Unfortunately in Firefox 46.0.1 for me:
Lock Downloads - doesn't work
Lock Library(Downloads/History/Tags/Bookmarks) - doesn't work
Lock Add-ons windows - work
Lock Firefox options - doesn't work
Lock 'about:config' settings page - work
Lock addition of Bookmarks - doesn't work
Lock History sidebar - doesn't work
Lock Bookmarks sidebar - doesn't work
Lock Toolbar Customization - doesn't work
Lock 'Clear Private data' window - work

PubliFox ver 1.11.6.1-signed.1-signed