Examine source code of DownLoadAlbums

{
  "manifest_version": 2,
  "name": "DownLoadAlbums",
  "version": "1.0",
  "description": "Ajoute un bouton qui permet le téléchargement des albums sur le site toutemonannee.com",
  "icons": {
    "48": "icons/down.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "jpazerty_first_attempt6@example.com"
    }
  },
  "permissions": [
    "storage",
    "<all_urls>"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://www.toutemonannee.com/*"
      ],
      "js": [
        "itop.js"
      ]
    }
  ]
}