Examine source code of Cube Scrambler

{
  "manifest_version": 2,
  "name": "Cube Scrambler",
  "version": "1.2",
  "description": "Generates random Rubik's Cube scrambles.",
  "permissions": [
    "activeTab",
    "storage"
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_title": "Cube Scrambler",
    "default_icon": {
      "16": "icon.svg",
      "48": "icon.svg",
      "96": "icon.svg",
      "128": "icon.svg"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{c5a258b9-b1ff-4bb9-bafd-611798c20f68}"
    }
  }
}