Examine source code of New New Tab Page

{
  "chrome_url_overrides": {
    "newtab": "newtab.html"
  },
  "content_security_policy": "script-src 'self'; object-src 'self'",
  "description": "A minimal new tab page replacement",
  "icons": {
    "16": "img/icon16.png",
    "128": "img/icon128.png"
  },
  "author": "Zachary Guard",
  "manifest_version": 2,
  "name": "__MSG_extensionName__",
  "options_page": "options/options.html",
  "version": "4.8.8",
  "short_name": "NNTP",
  "default_locale": "en",
  "permissions": [
    "topSites",
    "management",
    "bookmarks",
    "storage",
    "sessions",
    "tabs",
    "geolocation",
    "*://*/*"
  ],
  "background": {
    "page": "newtab.html",
    "persistent": true
  },
  "applications": {
    "gecko": {
      "id": "New-New-Tab-Page@zacharyguard.co.nf",
      "strict_min_version": "54.0"
    }
  }
}