Examine source code of HomeGrid

{
  "manifest_version": 2,
  "name": "HomeGrid",
  "version": "1.1",
  "description": "A sleek custom homepage with draggable website tiles and recently closed tabs for faster browsing.",
  "permissions": [
    "tabs",
    "sessions",
    "storage",
    "activeTab",
    "<all_urls>"
  ],
  "chrome_url_overrides": {
    "newtab": "newtab.html"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "content_security_policy": "script-src 'self'; object-src 'self'",
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{dc4d3db0-e062-4e2a-ba63-5ae3ebe4d956}"
    }
  }
}