Examine source code of Gartic Cellulart

{
  "manifest_version": 3,
  "name": "Gartic Cellulart for Gartic Phone",
  "version": "1.7.8",
  "description": "Level up your Gart.",
  "icons": {
    "48": "ico48.png",
    "128": "ico128.png"
  },
  "action": {
    "default_popup": "popup/popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "https://garticphone.com/*",
        "https://beta.garticphone.com/*"
      ],
      "css": [
        "content.css"
      ],
      "js": [
        "content.js"
      ]
    },
    {
      "matches": [
        "https://garticphone.com/*",
        "https://beta.garticphone.com/*"
      ],
      "js": [
        "injector.js"
      ],
      "run_at": "document_start",
      "all_frames": true
    }
  ],
  "host_permissions": [
    "https://garticphone.com/*",
    "https://beta.garticphone.com/*"
  ],
  "permissions": [
    "storage"
  ],
  "web_accessible_resources": [
    {
      "matches": [
        "https://garticphone.com/*",
        "https://beta.garticphone.com/*"
      ],
      "resources": [
        "assets/*",
        "injected.js",
        "worker.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{9c773d26-5b2c-4c3e-ad36-a5a98e2d1d0f}",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": [
          "technicalAndInteraction"
        ]
      }
    }
  }
}