Your Ficus prefers bright indirect light. Direct sun may burn the leaves and cause them to drop.
Water when the top 2-3 inches of soil are dry. Water until liquid flows through the drainage hole at the bottom of the pot and discard any water that has accumulated in the saucer.
Ficus plants are sensitive to being moved. If you have to move your plant around, do so gradually. Any sudden changes can cause leaves to drop.
Ficus leaves are mildly toxic to humans and pets.