Examine source code of JustWatch - Hide Ratings

{
  "manifest_version": 2,
  "name": "JustWatch - Hide Ratings",
  "version": "1.0",
  "description": "Hides IMDB ratings, JustWatch scores, and thumb ratings on JustWatch.",
  "browser_specific_settings": {
    "gecko": {
      "id": "justwatch-hide-ratings@extension",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.justwatch.com/*"
      ],
      "js": [
        "content.js"
      ]
    }
  ]
}