Examine source code of Link Follow Detector

{
  "manifest_version": 3,
  "name": "Link Follow Detector",
  "version": "1.1",
  "description": "Détecte et met en évidence les liens dofollow et nofollow sur une page web",
  "permissions": [
    "activeTab",
    "storage"
  ],
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "48": "48.png",
      "128": "128.png"
    }
  },
  "icons": {
    "48": "48.png",
    "128": "128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "css": [
        "styles.css"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "link-follow-detector@influsweb.com",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  }
}