Examine source code of Password Generator

{
  "manifest_version": 2,
  "name": "Password Generator Extension",
  "version": "1.1",
  "description": "Generatore di password sicure",
  "icons": {
    "16": "icons/lock16.png",
    "48": "icons/lock48.png",
    "128": "icons/lock128.png"
  },
  "browser_action": {
    "default_popup": "popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.mozilla.org/*"
      ],
      "js": [
        "popup.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{ef66b400-d0e2-4fec-ac59-a54622fcada5}"
    }
  }
}