Examine source code of Standin 2

{
  "manifest_version": 2,
  "name": "Standin",
  "version": "0.2.6",
  "description": "Open pages from sites like Youtube or Twitter with alternative frontends like Piped or Nitter!",
  "icons": {
    "16": "assets/logo16.png",
    "48": "assets/logo48.png",
    "128": "assets/logo128.png"
  },
  "web_accessible_resources": [
    "assets/options-gear-teal-256.png",
    "assets/youtubeStandin.png",
    "assets/twitterStandin.png",
    "assets/redditStandin.png",
    "assets/mediumStandin.png",
    "assets/tiktokStandin.png",
    "assets/imgurStandin.png"
  ],
  "browser_action": {
    "default_icon": "assets/logo16.png",
    "default_popup": "popup.html"
  },
  "options_ui": {
    "page": "options.html"
  },
  "background": {
    "scripts": [
      "js/utils.js",
      "js/context.js",
      "js/domains.js"
    ],
    "persistent": true
  },
  "permissions": [
    "contextMenus",
    "activeTab",
    "storage"
  ],
  "//1": "content_security_policy : script-src 'self' https://ajax.googleapis.com/ajax/libs/jquery/3.6.0/jquery.min.js; object-src 'self'",
  "browser_specific_settings": {
    "gecko": {
      "id": "{78987e83-567c-4335-bbc1-c4fd53f81263}"
    }
  }
}