Examine source code of switips

{
  "name": "MySwitPlanet",
  "short_name": "MySwitPlanet",
  "version": "2.1.2.0",
  "description": "Искать товары с кэшбэком стало еще легче. Возвращайте кэшбэк, не заходя на сайт!",
  "author": "swts.club",
  "manifest_version": 2,
  "permissions": [
    "tabs",
    "webRequest",
    "storage",
    "<all_urls>",
    "unlimitedStorage",
    "cookies",
    "management"
  ],
  "background": {
    "scripts": [
      "vendors/bundle.js",
      "bg/bundle.js"
    ],
    "persistent": true
  },
  "content_scripts": [
    {
      "all_frames": false,
      "js": [
        "vendors/bundle.js",
        "content/bundle.js"
      ],
      "matches": [
        "<all_urls>"
      ],
      "run_at": "document_end"
    }
  ],
  "browser_action": {
    "default_icon": "icon-default.png",
    "default_title": "MYSWITPLANET",
    "default_popup": "popup.html"
  },
  "icons": {
    "16": "icon-48.png",
    "18": "icon-48.png",
    "32": "icon-48.png",
    "128": "icon-48.png"
  },
  "content_security_policy": "script-src 'self'; object-src 'self'",
  "web_accessible_resources": [
    "content/*.css",
    "content/*.svg",
    "icon-32.png"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "switips@extension.com"
    }
  }
}