Examine source code of XayBlock

{
  "name": "XayBlock",
  "version": "1.0",
  "description": "O melhor bloqueador de anúncio! XayBlock",
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "icons": {
    "16": "icons/logo_16x16.png",
    "48": "icons/logo_48x48.png",
    "128": "icons/logo_128x128.png"
  },
  "manifest_version": 2,
  "browser_specific_settings": {
    "gecko": {
      "id": "{9de7e5ca-11a4-4000-b4d2-6ef96169e4c2}"
    }
  }
}