Examine source code of GrowthPool

{
  "manifest_version": 2,
  "name": "GrowthPool",
  "description": "description",
  "version": "0.0.4",
  "icons": {
    "64": "icons/icon.png"
  },
  "permissions": [
    "tabs",
    "cookies",
    "*://*.twitter.com/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "*://127.0.0.1/setup/",
        "*://*.growthpool.xyz/setup/"
      ],
      "js": [
        "content_script.js"
      ],
      "run_at": "document_end"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "addon@growthpool.xyz",
      "strict_min_version": "54.0"
    }
  }
}