Use raw chicken to tame them and sweet berries to breed them!
33% Chance of taming
Wild foxes have most of the vanilla behavior when wild
Leaping on targets
Tamed foxes sleep when their owner does
Foxes follow owner
You can shift + right-click to let the fox hold items
Right-click to make the fox sit
Shift Right-click with an empty hand to make the fox sleep
If the fox is holding a totem of undying, the fox will consume it and be reborn.
Foxes attack the owner's target
Foxes attack what that attacked the owner.
Foxes attack chickens and rabbits
Snow and red foxes.
Foxes sleep on the bed with their owner.