Hi , The Furnace speed cant be able to make it fast. i follow and set acorrdingly  but its still nothing happen. Oh yah Sometime i did  it on admin by smelting fast but for players still doing the normal speed

Please, append your configuration file.

{
  "Permission": "quicksmelt.use",
  "Use Permission": true,
  "Speed Multipliers": {
    "furnace": 10.0,
    "furnace.large": 10.0,
    "refinery_small_deployed": 10.0,
    "campfire": 1.0,
    "skull_fire_pit": 1.0,
    "fireplace.deployed": 1.0,
    "bbq.deployed": 1.0
  },
  "Fuel Usage Speed Multipliers": {
    "furnace": 0.4,
    "furnace.large": 0.4,
    "refinery_small_deployed": 0.4,
    "campfire": 1.0,
    "skull_fire_pit": 1.0,
    "fireplace.deployed": 1.0,
    "bbq.deployed": 1.0
  },
  "Fuel Usage Multipliers": {
    "furnace": 5,
    "furnace.large": 5,
    "refinery_small_deployed": 5,
    "campfire": 1,
    "skull_fire_pit": 1,
    "fireplace.deployed": 1,
    "bbq.deployed": 1
  },
  "Output Multipliers": {
    "furnace": {
      "metal.fragments": 1.0,
      "sulfur": 1.0,
      "metal.refined": 1.0,
      "charcoal": 10.0
    },
    "furnace.large": {
      "metal.fragments": 1.0,
      "sulfur": 1.0,
      "metal.refined": 1.0,
      "charcoal": 10.0
    },
    "refinery_small_deployed": {
      "lowgradefuel": 1.0,
      "charcoal": 10.0
    },
    "campfire": {
      "bearmeat.cooked": 1.0,
      "chicken.cooked": 1.0,
      "deermeat.cooked": 1.0,
      "fish.cooked": 1.0,
      "horsemeat.cooked": 1.0,
      "humanmeat.cooked": 1.0,
      "meat.pork.cooked": 1.0,
      "wolfmeat.cooked": 1.0,
      "charcoal": 10.0
    },
    "skull_fire_pit": {
      "bearmeat.cooked": 1.0,
      "chicken.cooked": 1.0,
      "deermeat.cooked": 1.0,
      "fish.cooked": 1.0,
      "metal.refined": 1.0,
      "horsemeat.cooked": 1.0,
      "humanmeat.cooked": 1.0,
      "meat.pork.cooked": 1.0,
      "wolfmeat.cooked": 1.0,
      "charcoal": 10.0
    },
    "fireplace.deployed": {
      "bearmeat.cooked": 1.0,
      "chicken.cooked": 1.0,
      "deermeat.cooked": 1.0,
      "fish.cooked": 1.0,
      "metal.fragments": 1.0,
      "horsemeat.cooked": 1.0,
      "humanmeat.cooked": 1.0,
      "meat.pork.cooked": 1.0,
      "wolfmeat.cooked": 1.0,
      "charcoal": 10.0
    },
    "bbq.deployed": {
      "bearmeat.cooked": 1.0,
      "chicken.cooked": 1.0,
      "deermeat.cooked": 1.0,
      "fish.cooked": 1.0,
      "sulfur": 1.0,
      "horsemeat.cooked": 1.0,
      "humanmeat.cooked": 1.0,
      "meat.pork.cooked": 1.0,
      "wolfmeat.cooked": 1.0,
      "charcoal": 10.0
    }
  },
  "Whitelist": {
    "furnace": [
      "metal.ore",
      "sulfur.ore",
      "hq.metal.ore",
      "can.tuna.empty",
      "can.beans.empty",
      "bearmeat",
      "chicken.raw",
      "deermeat.raw",
      "fish.raw",
      "horsemeat.raw",
      "humanmeat.raw",
      "meat.boar",
      "wolfmeat.raw",
      "crude.oil",
      "charcoal"
    ],
    "furnace.large": [
      "metal.ore",
      "sulfur.ore",
      "hq.metal.ore",
      "bearmeat",
      "chicken.raw",
      "deermeat.raw",
      "fish.raw",
      "horsemeat.raw",
      "humanmeat.raw",
      "meat.boar",
      "wolfmeat.raw",
      "can.tuna.empty",
      "can.beans.empty",
      "crude.oil",
      "charcoal"
    ],
    "small.oil.refinery": [
      "crude.oil"
    ],
    "campfire": [
      "bearmeat",
      "chicken.raw",
      "deermeat.raw",
      "fish.raw",
      "horsemeat.raw",
      "humanmeat.raw",
      "meat.boar",
      "wolfmeat.raw",
      "can.tuna.empty",
      "can.beans.empty",
      "charcoal"
    ],
    "skull_fire_pit": [
      "bearmeat",
      "chicken.raw",
      "deermeat.raw",
      "fish.raw",
      "hq.metal.ore",
      "horsemeat.raw",
      "humanmeat.raw",
      "meat.boar",
      "wolfmeat.raw",
      "can.tuna.empty",
      "can.beans.empty",
      "charcoal"
    ],
    "fireplace.deployed": [
      "bearmeat",
      "chicken.raw",
      "deermeat.raw",
      "fish.raw",
      "metal.ore",
      "horsemeat.raw",
      "humanmeat.raw",
      "meat.boar",
      "wolfmeat.raw",
      "can.tuna.empty",
      "can.beans.empty",
      "charcoal"
    ],
    "bbq.deployed": [
      "bearmeat",
      "chicken.raw",
      "deermeat.raw",
      "fish.raw",
      "horsemeat.raw",
      "sulfur.ore",
      "humanmeat.raw",
      "meat.boar",
      "wolfmeat.raw",
      "can.tuna.empty",
      "can.beans.empty",
      "charcoal"
    ]
  },
  "Blacklist": {
    "global": [
      "bearmeat.cooked",
      "chicken.cooked",
      "deermeat.cooked",
      "fish.cooked",
      "horsemeat.cooked",
      "humanmeat.cooked",
      "meat.pork.cooked",
      "wolfmeat.cooked"
    ]
  },
  "Smelting Frequencies (Smelt items every N smelting ticks)": {
    "global": 1
  },
  "Debug": false
}

Merged post

Does this works for everyone ?
or do i need to use this>>oxide.grant group default quicksmelt.use

Sure you do! You have "Use Permission" true. Or set it to false to make it work for everyone.