I was having some trouble getting the Don Gero Mask so I looked here to see that the way you get it is not stated. So can some1 please help me out here? I will lock this topic once an answer is given.
You get the goron mask, light all the torches in the goron home, hit the rotating ceiling pots until you get a rock out of one. Pick it up, carry it to the shivering goron wearing the Don Gero mask near the sword smith's house.
Simple as that.
You can't do this until you beat the Snowhead Temple, or at least get the fire arrows.