manifest.json

{
  "manifest_version": 3,

  "name": "Tab Mover",
  "description": "Rearrange tabs with keyboard shortcuts.",
  "version": "2.0.1",
  "commands": {
    "move-right": {
      "suggested_key": {
        "mac": "MacCtrl+Shift+PageDown"
      },
      "description": "move tab right"
    },
    "alternative-right": {
      "suggested_key": {
        "mac": "MacCtrl+Shift+Period"
      },
      "description": "Alternative command to move right."
    },
    "move-left": {
      "suggested_key": {
        "mac": "MacCtrl+Shift+PageUp"
      },
      "description": "move tab left"
    },
    "alternative-left": {
      "suggested_key": {
        "mac": "MacCtrl+Shift+Comma"
      },
      "description": "Alternative command to move left."
    },
    "new-window": {
      "description": "Move the current tab to a new window."
    }
  },
  "background": {
    "service_worker": "backgroundscript.js"
  }
}