Examine source code of Pinkipedia

{
  "manifest_version": 2,
  "name": "Wikipedia en Rose",
  "version": "1.0",
  "description": "Affiche Wikipedia avec un thème rose",
  "content_scripts": [
    {
      "matches": [
        "*://*.wikipedia.org/*"
      ],
      "css": [
        "rose.css"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "wikipedia-rose@tonnom.com",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  }
}