Bukkit

General:

• EnableMessages: If enabled players will get a message every time they loose
  money by using backfire. (default: true)
• EnableEggheal: Enables the automatic healing-function for players with the
  permission "backfire.eggheal". It also fills up the players' food-bar. (default: false)

Backfire:

• Type: Type of damage given to the attacking mob. If set to none you can still use the
  "ChangeDamage"-function. Possible values: dmg/burn/both/none
• Burntime: Time players burn if Type is set to "burn" or "both". (default: 1)
• DamageMultiplier: Monsters get the damage they would normally do
  to the player, you can multiply it with a number you choose. (default: 1)

ChangeDamage:

• Enable: Do you want the damage the player gets to be changed? (default: false)
• Factor: The factor the damage which is given to the player is multiplied with. (default: 1.0)

Economy:

• Enable: Do you want to lt the players pay for using Backfire? (default: false)
• CostPerDamage: The amount of money a user automatically pays for each point of damage he gets
  when using the Backfire-function. (One zombie-attack usually deals 3 damage,
  a shot by a skeleton 4; default: 0.5)