On this Win-10 laptop, 64-bit, FF version 71: I'm not enabled to drag bookmarks via the "library" icon at right of pocket/star icons. Rather just via Bookmarks on Menu Bar. But FF seems to have messed the Menu-Bar bookmarks by duplicating its drop-down endlessly. (I had frustratedly posted a pic of that in an alternate post) I don't know why on earth everything is so defective. The library-icon venue disallows dragging, and also has duplicated lotsa stuff during import, plus omitted stuff. The menu-bar venue allows dragging, but has self-replicated over & over. I'd have had my Favicons conveniently on my toolbar ......if only i could have clean-reinstalled by now. I'd be able to conveniently drag/drop from a non-replicated Bookmarks on menu-bar ......if only i could have clean-reinstalled by now. This has guzzled so much time already, that i'm getting sick from it & ever-deeper mired. (I didn't get a chance to check yet if there was a reply to my last followup on aforesaid issues. I might not get a chance to check on this either due to guzzled-time. It may turn out to be just another rhetorical posting of bugs which never get fixed.