Examine source code of Modern Kiosk

{
  "manifest_version": 2,
  "name": "Modern Kiosk",
  "description": "Kiosk-like facility extension for modern browsers",
  "homepage_url": "https://github.com/racketlogger/ModernKiosk",
  "version": "0.12",
  "permissions": [
    "menus",
    "activeTab",
    "browserSettings",
    "storage"
  ],
  "background": {
    "scripts": [
      "mk_bg.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content/nocontextmenu.js"
      ]
    }
  ],
  "icons": {
    "48": "icons/mk.svg"
  },
  "options_ui": {
    "page": "options.html",
    "browser_style": true
  },
  "browser_action": {
    "default_icon": {
      "32": "icons/mk.svg"
    }
  }
}