Nonsense, flat earth is not biblical.
The "FIRMAMENT" separates the "waters above" from the "waters below".
Revelation 17:15 tells you the "waters", WHERE THE PROSTITUTE SITS, stands for people, multitudes, nations, and languages.
There is no dome.
“You are the light of the world. A town built on a hill cannot be hidden. Neither do people light a lamp and put it under a bowl. Instead they put it on its stand, and it gives light to everyone in the house." - Matthew 5:14-15
"And he said unto them, Unto you it is given to know the mystery of the kingdom of God: but unto them that are without, all these things are done in parables: That seeing they may see, and not perceive; and hearing they may hear, and not understand; lest at any time they should be converted, and their sins should be forgiven them." Mark 4:11-12