Examine source code of Schriftarten

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "Schriftarten",
  "version": "0.1",
  "manifest_version": 2,
  "description": "Schriftarten und Signaturgenerator für Instagram, Tiktok, Facebook.",
  "homepage_url": "https://schriftarten123.com/",
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "default_locale": "de",
  "background": {
    "page": "src/bg/background.html",
    "persistent": false
  },
  "browser_action": {
    "default_icon": "icons/icon19.png",
    "default_title": "https://schriftarten123.com/",
    "default_popup": "src/browser_action/browser_action.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{fe23f3b6-f655-40bc-92ed-debc5d2ef1f2}"
    }
  }
}