Examine source code of Fresh Tab

{
  "manifest_version": 3,
  "name": "Fresh Tab",
  "version": "1.0",
  "description": "A modern new tab: search, shortcuts, notes, and custom backgrounds. Fast, private, and free.",
  "icons": {
    "16": "icon16.png",
    "32": "icon32.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "chrome_url_overrides": {
    "newtab": "newtab.html"
  },
  "permissions": [
    "storage"
  ],
  "host_permissions": [
    "https://www.google.com/*",
    "https://duckduckgo.com/*",
    "https://search.yahoo.com/*",
    "https://search.brave.com/*",
    "https://yandex.com/*",
    "https://www.bing.com/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "fresh-tab@lkr1x",
      "strict_min_version": "109.0"
    }
  }
}