Examine source code of QuickTabs Light

{
  "manifest_version": 2,
  "name": "QuickTabs Light",
  "version": "1.1resigned1",
  "description": "Switch tabs with a button. Version without F3 to close. This is a lightweight fork of QuickTabs by Prod.",
  "permissions": [
    "tabs",
    "storage"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "commands": {
    "prev-tab": {
      "suggested_key": {
        "default": "F1"
      },
      "description": "Switch to previous tab"
    },
    "next-tab": {
      "suggested_key": {
        "default": "F2"
      },
      "description": "Switch to next tab"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{530ab733-35b3-486b-ad23-297c386109c9}"
    }
  }
}