Examine source code of rewardo

{
  "name": "rewardo Cashback Deals Gutscheine und Rabatte",
  "short_name": "rewardo",
  "version": "1.6.4",
  "description": "Nie wieder Cashback verpassen! Ihr Einkaufshelfer für über 1600 Shops. Reisen, Fashion, Technik - die besten Angebote und Aktionen.",
  "homepage_url": "https://rewardo.de",
  "manifest_version": 2,
  "permissions": [
    "tabs",
    "webRequest",
    "storage",
    "<all_urls>"
  ],
  "applications": {
    "gecko": {
      "id": "Rewardo@Rewardo",
      "strict_min_version": "48.0"
    }
  },
  "content_scripts": [
    {
      "all_frames": false,
      "js": [
        "ci.content.pack.js",
        "js/libs/jquery.min.js",
        "js/libs/handlebars.runtime.min.js",
        "js/libs/underscore-min.js",
        "js/libs/backbone-min.js",
        "js/content/templates.js",
        "js/content/style.js",
        "js/content/serp.js",
        "js/content/slider.js",
        "js/content/content.js"
      ],
      "matches": [
        "<all_urls>"
      ],
      "run_at": "document_start"
    },
    {
      "all_frames": false,
      "js": [
        "ci.browser.helper.js"
      ],
      "matches": [
        "<all_urls>"
      ],
      "run_at": "document_end"
    }
  ],
  "background": {
    "page": "background.html"
  },
  "browser_action": {
    "default_icon": "img/neutral_16.png",
    "default_title": "Reward-on"
  },
  "icons": {
    "16": "img/neutral_16.png",
    "32": "img/neutral_32.png",
    "48": "img/neutral_48.png",
    "64": "img/neutral_64.png",
    "128": "img/neutral_128.png"
  }
}