Show Published Date

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 2,
  "name": "Show Published Date",
  "short_name": "Ver la fecha de publicacion del contenido",
  "description": "Muestra la fecha de publicación de la página en la que estás.",
  "icons": {
    "16": "images/nuevo2-16.png",
    "24": "images/icon24-2.png",
    "32": "images/icon32-2.png",
    "64": "images/icon64-2.png",
    "128": "images/icon128-2.png"
  },
  "browser_action": {
    "default_icon": {
      "16": "images/nuevo2-16.png",
      "24": "images/icon24-2.png",
      "32": "images/icon32-2.png",
      "64": "images/icon64-2.png",
      "128": "images/icon128-2.png"
    }
  },
  "version": "2.0.2",
  "version_name": "Anade itemprop y nuevo icono",
  "permissions": [
    "activeTab"
  ],
  "background": {
    "persistent": false,
    "scripts": [
      "background.js"
    ]
  }
}