Examine source code of Clean Tab - New Tab Page

{
  "chrome_url_overrides": {
    "newtab": "newtab.html"
  },
  "description": "New Tab page replacement with beautiful photography.",
  "icons": {
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "options_ui": {
    "page": "options.html"
  },
  "manifest_version": 3,
  "name": "Clean Tab - New Tab Page",
  "short_name": "Clean Tab",
  "version": "0.54",
  "author": "Edward Bowden",
  "homepage_url": "https://edwardbowden.uk",
  "browser_specific_settings": {
    "gecko": {
      "id": "{4ff0f9cb-a39b-4e5b-8694-b668b5c1f5b4}"
    }
  }
}