"By default, Signal is being launched with the filesystem=host option to allow access to the host filesystem.
This is currently required because Electron decided to break the portals (temporarily):
See flathub/org.signal.Signal#719 and electron/electron#43819
If you disagree with host filesystem access, please use Flatseal (or the commandline) to restrict the permissions
to the only those directories you want Signal to be able access for reading and writing files.
Press Yes to proceed with filesystem=host or No to exit.
If you manually changed the permissions with Flatseal already, you can press Yes to continue"
What do we need to type in the terminal
in order to restrict these permissions,
before pressing yes ???