顔本 is read as かおぼん (kaobon) and means Facebook.
かおぼん
kaobon
かお
face
がん
かおいろ
complexion
かおつき
(outward) looks
かおだち
looks
かおあわせ
being matched
かおみしり
acquaintance
がんめん
face (of person)
かおなじみ
かおまけ
being put to shame
がんりょう
pigment
かおむけ
showing one's face in public