The world champions led 22-6 at half-time and doubled their tally after the break at the Stade Aime Giral.
With skipper Darren Lockyer out injured, the Kangaroos played Scott Prince and Craig Gower at half-back.
The French were hit by the loss of centre Teddy Fadaoui on the eve of the match while playmaker Julian Rinaldi missed most of the second half.