>>12570267Yes and no... but I don't think so, if anything it happens faster!
eg.
in a closed system, a fuel can of petrol, a box of matches and air has the same amount of total energy as all of them combined in an inferno... except the inferno is less dense as it takes up more volume of space.
In a non closed system, energy escapes as heat so energy is 'lost' and if there is less energy, there is less time dilation... so it goes faster. . . just a guess tho.
It might work (slow down) if the 'fire' is nuclear in nature, like in conditions of the BigBang or particle colliders... but that's not really 'fire' fire...