As an ex 'Mr Shifter' cargo F/E (forced into early retirement from flying) I was somewhat ammused by the 'fire-fighting kit' that was provided by the company for the purpose of fighting a Main Deck fire.
Given that the QRH Fire/Smoke drills are quite lengthy/complex, it was somewhat of a joke to expect a 'duty hero' to go down there armed with a smoke mask and a fire bottle whilst 'dressed' in a 'fire suit'.
I agree with SNS3Guppy; the complexities of trying to suppress a cargo fire are somewhat onerous. You could also say... futile! That being said, making a climb into 'thinner air' is also a bit of a 'pipe-dream', because despite the scientific malarky of taking away the oxygen, to suppress the fire, you'd have to outclimb the performance of the aeroplane in order to do so.
Captain to Eng... engage 'warp drive' and get us into orbit... asap!
The practicalities are somewhat limiting... don't you agree?
Given the choice of African Killer Bees or a Cargo Fire... what's the difference; open-up your duty free booze and have a final drink and a smoke before you arrive at the hard-deck.
Ooops, sorry chaps, I mustn't provide 'second-hand' smoke; have one of mine... smoking kills!
My appologies for being flippant, but if you're going to lie-awake all night (all day for cargo chaps) worrying about a cargo fire... it's time to hang-up your headset.
TCF