In this passage, the setting details that cause the narrator to feel uneasy are: (1) the dark furniture and (4) the curtains that sway because of an approaching storm.
Reference to the dark furniture is made in the lines "...the gloomy furniture of the room" and reference to the curtains that sway is made in the lines "the dark and tattered draperies, which, tortured into motion by the breath of a rising tempest, swayed fitfully to and fro upon the walls, and rustled uneasily about the decorations of the bed".