Air France's economy cabin offers a 3-3 layout (A,B,C - D,E,F).
On the aircraft illustrated, economy stretches from row 11 to 35, with 11 to 19 reserved for those who choose the Premium Economy option.
On this aircraft, seats 9D, 22 A and F and 23D are missing, so 10D and 24D are good choices, as are the exit rows nine and 23.
On the all-economy version, the layout is very similar, although there are 37 rows. Seats 9D, 22 A and F and 23D are missing, so the seats behind these are excellent. The exit rows are 10 and 25.