Examine source code of BackMy.Cash

{
  "manifest_version": 2,
  "name": "BackMy.Cash",
  "author": "BackMy.Cash",
  "short_name": "BackMy.Cash",
  "homepage_url": "https://backmy.cash/extensions",
  "description": "Back My Cash - выгодный процент кэшбэка, скидки и купоны, сотни магазинов на любой вкус - присоединяйся!",
  "version": "1.80resigned1",
  "content_security_policy": "script-src 'self' ; object-src 'self'",
  "icons": {
    "16": "img/16/on_ready.png",
    "32": "img/32/on_ready.png",
    "64": "img/64/on_ready.png",
    "128": "img/128/on_ready.png"
  },
  "browser_action": {
    "default_icon": "img/64/on_ready.png",
    "default_popup": "popup.html",
    "default_title": "Кэшбэк-сервис Backmy.cash"
  },
  "background": {
    "scripts": [
      "js/jquery-3.2.1.min.js",
      "js/background.js"
    ]
  },
  "web_accessible_resources": [
    "img/logo.svg",
    "img/close.png"
  ],
  "permissions": [
    "webRequest",
    "activeTab",
    "tabs",
    "webRequestBlocking",
    "storage",
    "cookies",
    "notifications",
    "<all_urls>",
    "https://backmy.cash/user/check-auth"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{4856970d-10b9-497e-81af-2644e20ab2fd}"
    }
  }
}