Examine source code of GWars.Ru: extension tools

{
  "manifest_version": 2,
  "name": "GWars: extension tools",
  "version": "0.5",
  "description": "Дополнение расширяет интерфейс игры GWars для более комфортной игры.",
  "browser_action": {
    "browser_style": true,
    "default_popup": "html/popup.html",
    "default_icon": {
      "16": "icons/gwet-16.png",
      "32": "icons/gwet-32.png",
      "48": "icons/gwet-48.png",
      "128": "icons/gwet-128.png"
    }
  },
  "icons": {
    "16": "icons/gwet-16.png",
    "32": "icons/gwet-32.png",
    "48": "icons/gwet-48.png",
    "128": "icons/gwet-128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "https://www.gwars.ru/*",
        "https://www.gwars.io/*"
      ],
      "js": [
        "js/browser-polyfill.min.js",
        "gwet.js"
      ]
    }
  ],
  "options_ui": {
    "page": "html/settings.html",
    "browser_style": true
  },
  "permissions": [
    "notifications",
    "storage"
  ],
  "background": {
    "scripts": [
      "js/browser-polyfill.min.js",
      "js/background.js"
    ],
    "persistent": true
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{5fd22d01-8bf9-4fc5-a359-092d52aa75a9}"
    }
  }
}