This move looks funny, but it's typical in this line. White wants to develop with b3 followed by Bb2.
1. c2c4 Firouzja achieved an insane score playing the English Opening in the blitz part of the tournament. 1... c7c5  2. g2g3  2... g7g6  3. f1g2  3... f8g7  4. b1c3  4... b8c6  5. d2d3  5... d7d6 