Examine source code of blank

{
  "manifest_version": 2,
  "name": "blank",
  "description": "Blank new tab page or a new tab for the specified url.",
  "version": "2.2",
  "chrome_url_overrides": {
    "newtab": "index.html"
  },
  "background": {
    "page": "background.html"
  },
  "options_page": "options.html",
  "options_ui": {
    "page": "options.html",
    "browser_style": true,
    "open_in_tab": true
  },
  "icons": {
    "16": "icons/icon-16.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "browser_action": {
    "default_title": "blank"
  }
}