Examine source code of BeBack cashback service

{
  "applications": {
    "gecko": {
      "id": "support@beback.ru"
    }
  },
  "background": {
    "scripts": [
      "js/bg_img.js",
      "js/punycode.js",
      "js/utils.js",
      "js/httpUtils.js",
      "js/urlUtils.js",
      "js/settings.js",
      "js/cashback.js"
    ]
  },
  "browser_action": {
    "default_icon": "icons/icon48.png",
    "default_popup": "popup/index.html",
    "default_title": "Beback"
  },
  "content_scripts": [
    {
      "all_frames": false,
      "js": [
        "js/content.js"
      ],
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "run_at": "document_start"
    }
  ],
  "default_locale": "en",
  "description": "__MSG_appDesc__",
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "manifest_version": 2,
  "name": "__MSG_appName__",
  "permissions": [
    "webRequestBlocking",
    "webRequest",
    "cookies",
    "storage",
    "tabs",
    "http://*/*",
    "https://*/*"
  ],
  "version": "1.0.1.14",
  "web_accessible_resources": [
    "notify/*"
  ]
}