Examine source code of IMDb Watch Button

{
  "manifest_version": 3,
  "name": "IMDb Watch Button",
  "version": "1.0.0",
  "description": "Adds a Watch button to IMDb title pages linking to the matching PlayIMDb page.",
  "content_scripts": [
    {
      "matches": [
        "https://www.imdb.com/title/*"
      ],
      "js": [
        "content.js"
      ],
      "css": [
        "styles.css"
      ],
      "run_at": "document_idle"
    }
  ],
  "host_permissions": [
    "https://www.imdb.com/title/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "@imdb-watch-button",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  }
}