Before updating to Oneiric Ocelot, when I bookmarked a web page in Firefox, a dialog window opened and I got to choose which folder to put the bookmark into.

Ever since updating to Oneiric, when I bookmark a page in Firefox, it simply plunks the bookmark at the end of the unsorted bookmarks; no dialog box opens.
I don't think this is a Firefox change, because I see no conversations about this on the Firefox forums page. And I don't see a way within Firefox to modify this behavior.

Any ideas how to fix this?

Thank you.