Examine source code of Mpat3

{
  "description": "",
  "manifest_version": 2,
  "name": "télécharger youtube mp3",
  "version": "1.2resigned1",
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "https://www.youtube.com/"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://www.youtube.com/*"
      ],
      "js": [
        "index.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{1507ae48-b1b4-4791-b33d-d4d61c5b27b5}"
    }
  }
}