Examine source code of Amio

{
  "manifest_version": 2,
  "name": "Amio",
  "author": "Fabio Mereu",
  "description": "Traduce in corsivo milanese le tue pagine web",
  "version": "0.1",
  "browser_action": {
    "default_icon": {
      "128": "amio.png"
    }
  },
  "icons": {
    "128": "amio.png"
  },
  "permissions": [
    "storage"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": true
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "amio.js"
      ],
      "run_at": "document_end"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{3f7a8350-7275-4e86-b3fc-6c69b128c7bb}"
    }
  }
}