A Molotov cocktail made out of a Sunset Sarsaparilla bottle, filled with a flammable substance and stuffed with a rag to ignite it. It will also turn enemies into piles of green goo if the killing blow is a Critical Hit, similar to that of plasma-based energy weapons. This weapon qualifies as an improved holdout weapon.
One can be stolen from Angel cave, clutched in the hand of a partially buried skeleton.
Can also be purchased from Alexander, underneath the overpass at the 188 Trading Post.
As the fire bomb uses the dynamite animation set, the model of the weapon is not an exact match for the world model of Sarsaparilla bottles, including the dimensions and texture.
Fire bombs also provide an alternative version of the planting items trick. Instead of one's target exploding (as with other explosives), they will erupt into flames and collapse. If the target is knocked down, they will simply erupt into flames on whatever they were lying on.
Like a grenade, they do not go off on contact, so they can bounce away from the target. Also, they have a small effect radius. These two combined make them difficult to use outside of V.A.T.S.