This mod requires SMAPI and Spacechase's Custom Critters to run! Please make sure each are up to date or else the fireflies won't spawn properly.
INSTRUCTIONS
Unzip the folder and pick between the two versions! Choose either Having the fireflies appear on your farm during winter nights or having them disappear like every other bug out there! Once you decide open the file up and drag the next file into Mods > CustomCritters > Critters