Fire charges won't be consumed when igniting creepers with them in survival or adventure mode.
Differently, while igniting a TNT, the fire charge is consumed.
- Obtain a fire charge and switch into survival mode.
- Summon a creeper and use the fire charge on it.
- Take note as to whether or not fire charges are consumed when igniting creepers using them in survival or adventure mode.
The fire charge is not consumed.
The fire charge would be consumed.