> Looks like https://bugzilla.mozilla.org/show_bug.cgi?id=207636.
>
> javier
Got it. Thank you !
Creating a new profile fixed the problem.
Particularly, creating a new profile and copying its default bookmarks
to my existing profile... and more particularly, I surgically
implanted my bookmark entries into the new default bookmark file (via
an html editor) and now it works.
Apparently in the my original bookmarks some tag was missing or
something (I suspect during an "import" operation; which maybe a bug
in itself if import corrupts the bookmarks).
- Thomas