There was indeed a fuel for performers called 'Firewater', which was withdrawn (in the UK)due to it containing taste neutraliser compounds which made it prone to people mistaking it for water (also, taste neutralising compounds are generally highy toxic).
However, confusingly, there were/are other products brought out later, which were/are also called 'firewater', including, in the UK, a fuel which was actually pure paraffin (used as aviation fuel, considered the best option for fire arts due to complete absence of toxic additives like colouring and taste/smell suppressants).
The lesson is, be wary of anything called 'Firewater' until you find out what it actually is- the name 'firewater' means absolutely nothing- it could be pure paraffin, in could be a concoction of poisons, it could be anything.
_________________________
"You can't outrun Death forever.
But you can make the Bastard work for it."
--MAJOR KORGO KORGAR,
"Last of The Lancers"
AFC 32
Educate your self in the Hazards of Fire Breathing STAY SAFE!