Examine source code of News Cleaner FR

{
  "manifest_version": 3,
  "name": "News Cleaner",
  "version": "4.0",
  "description": "Une extension moderne pour purger vos sites d’actu préférés.",
  "browser_specific_settings": {
    "gecko": {
      "id": "news-cleaner@example.com",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions": [
    "storage",
    "tabs"
  ],
  "host_permissions": [
    "*://*.lefigaro.fr/*",
    "*://*.lemonde.fr/*",
    "*://*.liberation.fr/*",
    "*://*.leparisien.fr/*",
    "*://*.bfmtv.com/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://*.lefigaro.fr/*",
        "*://*.lemonde.fr/*",
        "*://*.liberation.fr/*",
        "*://*.leparisien.fr/*",
        "*://*.bfmtv.com/*"
      ],
      "js": [
        "sites.js",
        "content.js"
      ],
      "css": [
        "style.css"
      ],
      "run_at": "document_idle"
    }
  ],
  "action": {
    "default_popup": "popup.html"
  },
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  }
}