Examine source code of New Repl

{
  "manifest_version": 2,
  "name": "New Repl",
  "short_name": "Quickly make repls",
  "description": "Quickly create a new repl on repl.it! (Not associated with repl.it)",
  "version": "1.1.0",
  "icons": {
    "128": "icon_128_extension.png"
  },
  "permissions": [],
  "browser_action": {
    "browser_icon": "Icon_128.png",
    "default_popup": "popup.html",
    "default_title": "New Repl"
  }
}