Examine source code of Nevod shitpost filter

{
  "browser_specific_settings": {
    "gecko": {
      "id": "nevod_filter@mastirlaa.com"
    }
  },
  "manifest_version": 2,
  "name": "Nevod shitpost filter",
  "version": "0.1",
  "content_scripts": [
    {
      "matches": [
        "http://hock.ru/guest"
      ],
      "js": [
        "jquery-3.4.1.min.js",
        "content.js"
      ]
    }
  ],
  "options_ui": {
    "page": "options.html",
    "open_in_tab": false
  },
  "permissions": [
    "storage"
  ],
  "browser_action": {
    "default_icon": "icon.png",
    "default_popup": "options.html"
  }
}