Examine source code of Personal New Page

{
  "manifest_version": 2,
  "name": "Custom New Tab",
  "version": "1.1",
  "description": "Custom retro new tab for Firefox.",
  "author": "Gibsy",
  "icons": {
    "48": "icon.jpg"
  },
  "permissions": [
    "storage"
  ],
  "chrome_url_overrides": {
    "newtab": "index.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "custom-newtab@gibsy.dev",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  }
}