The fire feather is a quest item dropped by the Entrana firebird. Players need to obtain the fire feather as part of Heroes' Quest. In order to pick up the feather, the player must be wearing the Ice gloves. After Heroes' Quest is completed, the fire feather cannot be re-obtained. If a player tries to pick up the fire feather before starting Heroes' Quest, they will receive the message: "It looks dangerously hot, and you have no reason to take it."
It is impossible to telegrab this item, even if the player is wearing the ice gloves. When a player attempts to telegrab the feather, they will receive the message: "I can't use Telekinetic Grab on this object.".
For an exhaustive list of all known sources for this item, see here