Examine source code of XSSRush

{
  "manifest_version": 2,
  "name": "XSSRush",
  "author": "N45HT",
  "version": "2.1",
  "description": "An automatic XSS scanner",
  "browser_action": {
    "default_popup": "home.html",
    "default_icon": {
      "16": "images/icon_16x16.png",
      "32": "images/icon_32x32.png",
      "48": "images/icon_48x48.png",
      "72": "images/icon_72x72.png"
    }
  },
  "permissions": [
    "tabs",
    "notifications"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{aeb2764a-e3a0-48c9-ae73-1bef4e2150c1}"
    }
  }
}