Examine source code of SkribblConnect

{
  "manifest_version": 3,
  "name": "SkribblConnect",
  "version": "1.0.0",
  "description": "SkribblConnect v1.0.0",
  "host_permissions": [
    "*://skribbl.io/*"
  ],
  "license": [
    "all-rights-reserved"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://skribbl.io/*"
      ],
      "css": [
        "replacement-styles.css"
      ],
      "js": [
        "content-script.js"
      ],
      "run_at": "document_start",
      "all_frames": true
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{8051dd0d-a7d9-4f97-b263-a1c838e6abd5}",
      "strict_min_version": "135.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "web_accessible_resources": [
    {
      "resources": [
        "replacement-game.js",
        "replacement-styles.css"
      ],
      "matches": [
        "*://skribbl.io/*"
      ]
    }
  ]
}