Examine source code of Go to Current Domain

{
  "manifest_version": 2,
  "name": "Go to Current Domain",
  "version": "1.3",
  "description": "Go to current page domain with customizable shortcut",
  "permissions": [
    "tabs",
    "storage"
  ],
  "icons": {
    "48": "icons/icon.svg",
    "128": "icons/icon.svg"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_title": "Go to Current Domain",
    "default_popup": "popup/popup.html",
    "default_icon": {
      "48": "icons/icon.svg"
    }
  },
  "commands": {
    "go-to-domain": {
      "suggested_key": {
        "default": "Ctrl+Shift+Y"
      },
      "description": "Go to current domain"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "gotocurrentdomain@varya33",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}