Examine source code of CG Local

{
  "manifest_version": 3,
  "name": "CG Local",
  "description": "Synchronizes the CodinGame IDE with a local file so you can use your own editor.",
  "version": "1.2.1",
  "author": "Jasper van Merle",
  "homepage_url": "https://github.com/jmerle/cg-local-ext",
  "permissions": [
    "tabs",
    "storage"
  ],
  "icons": {
    "16": "icons/icon-16.png",
    "19": "icons/icon-19.png",
    "20": "icons/icon-20.png",
    "24": "icons/icon-24.png",
    "32": "icons/icon-32.png",
    "38": "icons/icon-38.png",
    "48": "icons/icon-48.png",
    "64": "icons/icon-64.png",
    "96": "icons/icon-96.png",
    "128": "icons/icon-128.png"
  },
  "action": {
    "default_title": "Enable CG Local",
    "default_icon": {
      "16": "icons/icon-16.png",
      "19": "icons/icon-19.png",
      "20": "icons/icon-20.png",
      "24": "icons/icon-24.png",
      "32": "icons/icon-32.png",
      "38": "icons/icon-38.png",
      "48": "icons/icon-48.png",
      "64": "icons/icon-64.png",
      "96": "icons/icon-96.png"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "https://www.codingame.com/*"
      ],
      "js": [
        "js/content/index.js"
      ]
    }
  ],
  "background": {
    "scripts": [
      "js/background/index.js"
    ],
    "type": "module"
  },
  "content_security_policy": {
    "extension_pages": "default-src 'self'; connect-src ws://localhost:53135"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{5aa8ef53-de72-474a-8ef1-03960a8e19f7}"
    }
  }
}