{
  "Use Permission": true,
  "Speed Multipliers": {
    "global": 10.0,
    "campfire, furnace, furnace.large": 10.0
  },
  "Fuel Usage Speed Multipliers": {
    "global": 5.0,
    "campfire, furnace, furnace.large": 5.0
  },
  "Fuel Usage Multipliers": {
    "global": 1,
    "campfire, furnace, furnace.large": 1
  },
  "Output Multipliers": {
    "global": {
      "global": 1.0
    },
    "campfire, furnace, furnace.large": {
      "charcoal": 2.0
    }
  },
  "Whitelist": {
    "global": [
      "item.shortname"
    ],
    "campfire, furnace, furnace.large": [
      "item.shortname"
    ]
  },
  "Blacklist": {
    "global": [
      "item.shortname"
    ],
    "furnace.shortname": [
      "item.shortname"
    ]
  },
  "Smelting Frequencies (Smelt items every N smelting ticks)": {
    "global": 0.1,
    "campfire, furnace, furnace.large": 0.1
  },
  "Debug": false
}

smelting frequencies cant be with a . they are only 1 2 3 not 0.1 not 1.0

I tried with 10 before and it didn't work

dont change smelting frequencies