Examine source code of Busca Milhas

{
  "name": "Busca Milhas",
  "version": "0.61",
  "manifest_version": 2,
  "description": "Busca Milhas Extension para busca de voos",
  "icons": {
    "16": "assets/images/icon-16.png",
    "48": "assets/images/icon-48.png"
  },
  "background": {
    "scripts": [
      "app.js"
    ]
  },
  "permissions": [
    "tabs",
    "http://*/*",
    "https://*/*",
    "background",
    "bookmarks",
    "clipboardRead",
    "clipboardWrite",
    "contentSettings",
    "cookies",
    "*://*.google.com/",
    "debugger",
    "management",
    "notifications",
    "pageCapture",
    "tabGroups",
    "topSites",
    "storage",
    "webNavigation",
    "webRequest",
    "webRequestBlocking",
    "identity",
    "identity.email"
  ],
  "omnibox": {
    "keyword": "OMNIBOX-KEYWORD"
  },
  "browser_action": {
    "default_icon": {
      "19": "assets/images/icon-19.png",
      "38": "assets/images/icon-38.png"
    },
    "default_title": "busca-milhas",
    "default_popup": "popup.html"
  },
  "web_accessible_resources": [
    "assets/images/icon-48.png"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{51e3dd44-d7c7-4ca9-bc7e-3ed921fd44f1}",
      "strict_min_version": "42.0"
    }
  }
}