Examine source code of Veilig Internetten

{
  "manifest_version": 2,
  "name": "Veilig Internetten",
  "description": "Zie direct hoe sterk je wachtwoord is zodra je op een website een wachtwoord invult of aanmaakt",
  "version": "1.5resigned1",
  "author": "Veiliginternetten.nl",
  "homepage_url": "https://veiliginternetten.nl",
  "icons": {
    "128": "icon128.png"
  },
  "browser_action": {
    "default_title": "Veilig Internetten",
    "default_icon": {
      "19": "icon20.png",
      "20": "icon20.png",
      "38": "icon38.png"
    },
    "default_popup": "dashboard.html"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "veiliginternetten.client.js"
      ],
      "run_at": "document_start"
    }
  ],
  "web_accessible_resources": [
    "resources/*"
  ],
  "permissions": [
    "activeTab"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{5caf53a3-6e0f-40b4-b816-ea59bf8c17b8}"
    }
  }
}