Examine source code of Pop-Up Search

{
  "manifest_version": 2,
  "name": "Pop-Up Search",
  "version": "1.5.1",
  "description": "Opens a prompt with search suggestions and URL completion.",
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "tabs",
    "activeTab",
    "https://suggestqueries.google.com/"
  ],
  "browser_action": {
    "default_popup": "popup/popup.html"
  },
  "commands": {
    "open-popup": {
      "suggested_key": {
        "default": "Ctrl+Shift+U"
      },
      "description": "Open custom search popup"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{bef98b62-d7fa-4a4e-b6c8-c0b224242977}"
    }
  }
}