Examine source code of Letterboxd Watch

{
  "manifest_version": 3,
  "name": "Letterboxd Watch",
  "description": "Letterboxd extension that provides you links to movie sites",
  "version": "1.7.1",
  "icons": {
    "128": "icon128.png"
  },
  "permissions": [
    "storage"
  ],
  "host_permissions": [
    "https://letterboxd.com/*"
  ],
  "action": {
    "default_popup": "src/options.html"
  },
  "options_ui": {
    "page": "src/options.html",
    "open_in_tab": true
  },
  "content_scripts": [
    {
      "matches": [
        "https://letterboxd.com/film/*"
      ],
      "js": [
        "src/common.js",
        "src/letterboxd-watch.js"
      ],
      "run_at": "document_end"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{f22abe9d-e321-4e67-946a-4ca945ae1824}",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}