Can't open portal file chooser in Firefox

Can't open portal file chooser in Firefox - Printable Version

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Can't open portal file chooser in Firefox - SpAiK - 08-30-2023

Hi, I've downloaded some Firefox appimages of different versions and also tested with locally installed latest stable version, but when I try to open a file or whatever menu that needs to load a file it does nothing and the terminal shows this output:

Code:
Gtk-WARNING **: 18:35:18.938: Can't open portal file chooser: GDBus.Error:org.freedesktop.DBus.Error.ServiceUnknown: The name org.freedesktop.portal.Desktop was not provided by any .service files

[Parent 67919, Main Thread] WARNING: invalid (NULL) pointer instance: 'glib warning', file /builds/worker/checkouts/gecko/toolkit/xre/nsSigHandlers.cpp:167

Any ideas of what happens? Thanks in advance.