Flatpak permissions

I am using Xfce - Xubuntu 20.04.4.
I installed Web (Epiphany) 42.2 from flatpak. While investigating some minor problems with Web I used command ‘flatpak permissions’ with the result shown below.

Read-write permissions are shown for several files. I do not know why these files have been selected here since I had not set up any of these permissions. The dummy name ‘database object’ holds the passwords for keypassxc.

snap.foliate does not exist on system.
snap.keypassxc does exist.

Do these read-write permissions allow the contents of files particularly ‘database object’ to be changed from within flatpak?
How can the permissions be removed?

I have installed FlatSeal but it reports “No Application Found”