Examine source code of customizable newtab

{
  "manifest_version": 2,
  "name": "Super Start - New Tab Dashboard",
  "version": "1.0.0",
  "description": "A customizable new-tab dashboard with tiles, search, clock, and background images.",
  "icons": {
    "48": "icons/icon48.png",
    "96": "icons/icon96.png"
  },
  "permissions": [
    "storage",
    "tabs"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "chrome_url_overrides": {
    "newtab": "newtab.html"
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{46ab2cbe-c03c-449b-a4bf-4bdf851f93fa}"
    }
  }
}