A fire extinguisher apparatus and related system is described for automatically suppressing stovetop fires. The fire extinguisher apparatus includes a canister restrained in a first location where the canister is operable to suppress fires on a rear burner of a stovetop. The canister is biased and movable to a second location where the canister is operable to suppress fires on a front burner of the stovetop. A trigger mechanism is provided for automatically moving the canister to the second location in response to a fire on the front burner. The fire extinguisher system includes an arrangement of fire extinguisher apparatuses wherein canisters are movable between the apparatuses to prevent collisions with external obstacles.