Javascript to Flowchart

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "Javascript to Flowchart",
  "short_name": "JTF",
  "description": "Convert javascript to flowchart",
  "version": "700.0.0.1",
  "permissions": [],
  "icons": {
    "16": "icon-16.png",
    "32": "icon-32.png",
    "48": "icon-48.png",
    "128": "icon-128.png"
  },
  "background": {
    "service_worker": "service_worker.js"
  },
  "manifest_version": 3,
  "action": {
    "default_title": "Javascript to Flowchart",
    "default_icon": "icon-19.png"
  },
  "content_security_policy": {}
}