Examine source code of Tab Domain Limiter

{
  "manifest_version": 2,
  "name": "Tab Domain Limiter",
  "short_name": "Tab Domain Limiter",
  "default_locale": "en",
  "description": "",
  "version": "1.0.0",
  "browser_specific_settings": {
    "gecko": {
      "id": "tab-domain-limiter@mozilla.kewis.ch"
    }
  },
  "icons": {
    "256": "/addon.png"
  },
  "permissions": [
    "tabs",
    "storage"
  ],
  "options_ui": {
    "page": "options/options.html"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  }
}