No, but as your mouse pointer is over the folder because you've just dropped the bookmark into it, you can just click and it will collapse the folder.
Thanks for answering the question. And of course, everyone is entitled to their opinions.Sorry, you asked whether it was possible to stop it; it isn't. Whether that's right or wrong is up to you. I'm just giving you an option that will take literally one click.
I much prefer the way Safari handles bookmarks than a browser like Firefox does.
Why not use the Edit Bookmarks option in the Bookmarks menu? Alt/Option + Cmd + B. That should give you folders that don't expand etc.Thanks for answering the question. And of course, everyone is entitled to their opinions.
Safari is fine for dragging one bookmark...but if one needs to organize say 30+ bookmarks, it's not ideal from a UI perspective. I wish Safari provided an option to turn it off and on collapsing folders.
Why not use the Edit Bookmarks option in the Bookmarks menu? Alt/Option + Cmd + B. That should give you folders that don't expand etc.