Examine source code of Sismos Chile

{
  "manifest_version": 2,
  "name": "Sismos Chile",
  "description": "Listado de ultimos sismos ocurridos en Chile",
  "version": "2.0",
  "browser_action": {
    "default_icon": "icono.png",
    "default_popup": "popup.html",
    "default_title": "Sismos Chile"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "contextMenus"
  ],
  "icons": {
    "16": "16.png",
    "48": "48.png",
    "128": "128.png"
  }
}