Examine source code of Zen Homepage

{
  "manifest_version": 2,
  "name": "Zen Homepage",
  "version": "1.2.0",
  "description": "Minimal new tab with liquid glass clock and custom wallpaper. Supports PNG, JPG, GIF, AVIF, WEBP.",
  "author": "taroimo",
  "homepage_url": "https://github.com/taroimo",
  "chrome_url_overrides": {
    "newtab": "index.html"
  },
  "content_security_policy": "script-src 'self'; object-src 'self'; style-src 'self' https://fonts.googleapis.com; font-src https://fonts.gstatic.com; img-src 'self' data: blob:;",
  "icons": {
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png",
    "128": "icons/icon-128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "zen-homepage@taroimo",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  },
  "permissions": [
    "tabs",
    "browserSettings"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  }
}