Examine source code of Extended URL Bar

{
  "name": "Extended URL Bar",
  "description": "Press Ctrl+Shift+Y to toggle it and easily access and edit the URL bar with a sleek, modern design.",
  "manifest_version": 2,
  "version": "1.4",
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "activeTab",
    "scripting",
    "tabs"
  ],
  "commands": {
    "toggle-feature": {
      "suggested_key": {
        "default": "Ctrl+Shift+Y"
      },
      "description": "Toggle URL bar"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{39006e70-0135-4a49-81d5-270c23730b5c}"
    }
  }
}