Examine source code of Rasmelthor

{
  "manifest_version": 2,
  "name": "Rasmelthor Live Extension",
  "version": "2.0.0",
  "description": "Avec cette extension, ne ratez plus aucun live de Rasmelthor !",
  "browser_action": {
    "default_popup": "index.html"
  },
  "icons": {
    "64": "img/online.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "notifications"
  ]
}