Examine source code of Empty New Tab

{
  "name": "Empty New Tab",
  "version": "2resigned1",
  "manifest_version": 2,
  "description": "Opens an absolutely empty new tab.",
  "icons": {
    "128": "icon.png"
  },
  "chrome_url_overrides": {
    "newtab": "tab.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{e7e7baaf-17c2-448a-a05e-e749789d7d7a}"
    }
  }
}