Do heavier objects experience more friction?

Yes, heavier objects do experience more friction. This is because since they are heavier, it means more gravity is pushing down on the object. Because there is more gravity on the object, it pushes on the ground harder than other objects. This increases the friction on the object. It would be like you rubbing your fingers together softly. Your finger slides easily, right? If you push down harder, it becomes harder for your fingers to slide. It is the same principle, but just on a larger scale.