I can't access the contents of this Safari folder

Hello,
I can’t read the contents of the “~/Library/Safari/LocalStorage” folder even though I have all the rights to access it (owner: Me, Group: Staff - chmod 755 on folder).
Does anyone have a suggestion?
Thanks.
Here is a basic example: (nothing is displayed)

Var desktopFiles As FolderItem = SpecialFolder.UserLibrary.Child("Safari").Child("LocalStorage")
For Each file As FolderItem In DesktopFiles.Children
  Listbox1.AddRow(file.Name)
Next

Don’t you need full disk access for the Safari data nowadays?