15.4 Beta - What package provides Gtk+3 File Chooser for Firefox?

All, Strange deal, Firefox on 15.4 Beta 91.9 (whatever comes with it) can not download ("save link") files. It doesn't matter if it is set to download all to "~/Downloads" or set to "Always ask" for a download location. Clicking the "save as" link in the context menu doesn't work. So much so, I just have to copy the link and use wget. (which gets old quick with at large number of files). Since the only desktops I loaded were icewm (with the install) and then KDE3 and fluxbox, my guess is there is an unidentified dependency that provides the dialog and makes the download work. (that's a guess) Anybody have any insight into what package is needed or why this may be happening? -- David C. Rankin, J.D.,P.E.