I have a fairly strong view and not one that will be massively popular, but I think Firefox was well down the list of a very average bunch of novice hurdlers last year so for him to a serious chaser he will need to improve bundles and on his Down Royal (RPR 135) run the other week he will need to make Put The Kettle On type improvement.
Of course you can't dismiss any horse after the one chase start but this horse isn't your standard novice chase recruit, he will have had far more racing than most novice chasers he will come up against so I wonder how much improvement there is.
I should point out that my only bet in the race is on L'eau de Sud who bizarrely has a similar profile to Firefox in terms of experience, my defence is that I backed him at double the price Firefox currently is and LDS already looks a much better chaser than he did hurdler....