Since GNOME 47, a new native filechooser (using Nautilus, GNOME's file manager) has been made available. However, you need to use the appropriate portal to access it (if not using GTK4's FileDialog, which would call it for you). This would call the desktop environment's preferred file picker; for example, someone running KDE would get KDE's file picker, and someone running GNOME would get the new Nautilus-based file picker. GNOME 47's file picker, for one, has numerous advantages over GTK's traditional file chooser: * Better-integrated with the rest of GNOME * Better listing and searching performance * Can generate image and video thumbnails (not just display them) * Very actively maintained As far as I can tell, LibreOffice currently still opens the old GTK "FileChooserDialog" widget. I have observed this on Fedora 41's GNOME 47 with: Version: 25.2.0.3 (X86_64) / LibreOffice Community Build ID: e1cf4a87eb02d755bce1a01209907ea5ddc8f069 CPU threads: 8; OS: Linux 6.12; UI render: default; VCL: gtk3 Locale: en-US (en_US.UTF-8); UI: en-US Flatpak Calc: threaded