Examine source code of New Tab by Search Crew

{
  "manifest_version": 3,
  "name": "New Tab by Search Crew",
  "version": "2.0",
  "description": "Easily access Search Crew from your new tab page.",
  "icons": {
    "16": "icon16.png",
    "48": "icon48.png",
    "96": "icon96.png",
    "128": "icon128.png"
  },
  "homepage_url": "https://searchcrew.github.io",
  "developer": {
    "name": "Slender Studios",
    "url": "https://www.slenderstudios.github.io"
  },
  "chrome_url_overrides": {
    "newtab": "index.html"
  },
  "options_ui": {
    "page": "pref.html",
    "open_in_tab": true
  },
  "permissions": [
    "cookies",
    "storage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "searchcrew@slenderstudios.onmicrosoft.com",
      "strict_min_version": "42.0"
    }
  }
}