Alerta de ofertas e descontos

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "Alerta de ofertas e descontos",
  "version": "1.8",
  "description": "Nunca mais perca uma oferta ou desconto!",
  "permissions": [
    "http://*/*"
  ],
  "icons": {
    "16": "16.png",
    "48": "48.png",
    "128": "128.png"
  },
  "manifest_version": 2,
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "script.js"
      ],
      "css": [
        "style/showdiv.css"
      ],
      "run_at": "document_end"
    }
  ],
  "web_accessible_resources": [
    "style/showdiv.css",
    "style/close-button.png"
  ]
}