Examine source code of Search Monster

{
  "manifest_version": 2,
  "name": "Search Monster",
  "author": "Syed Noman Ahmed",
  "description": "Take back your online privacy by using SearchMonster as your search engine.",
  "version": "1.1.9",
  "applications": {
    "gecko": {
      "strict_min_version": "57.0"
    }
  },
  "icons": {
    "57": "icons/searchmonster.png"
  },
  "permissions": [
    "activeTab"
  ],
  "chrome_settings_overrides": {
    "search_provider": {
      "name": "Search Monster",
      "search_url": "https://search.searchmonster.net/?s={searchTerms}&type=web&stype=all&src=sm_link&medium=sm&country_loc=US&flag=2",
      "favicon_url": "https://searchmonster.net/favicon.ico",
      "is_default": true
    }
  },
  "background": {
    "scripts": [
      "js/background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "https://*.searchmonster.net/*"
      ],
      "css": [
        "css/content.css"
      ],
      "run_at": "document_start"
    },
    {
      "matches": [
        "https://*.searchmonster.net/*"
      ],
      "js": [
        "js/content.js",
        "js/success.min.js"
      ]
    }
  ],
  "default_locale": "en"
}