Examine source code of Minesweeper Plus

{
  "manifest_version": 3,
  "name": "Minesweeper Plus",
  "version": "1.1.0",
  "description": "QOL for minefield.space.",
  "icons": {
    "32": "icon.png",
    "128": "128.png"
  },
  "permissions": [
    "storage"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://minefield.space/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "injected.js"
      ],
      "matches": [
        "https://minefield.space/*"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "minesweeper-plus@minefield.space",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}