Goniometer

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "Goniometer",
  "version": "0.0.13",
  "manifest_version": 3,
  "description": "Virtual Goniometer by Ryan Mo",
  "icons": {
    "16": "icon.png",
    "32": "icon.png",
    "48": "icon.png",
    "128": "icon.png"
  },
  "background": {
    "service_worker": "background.js"
  },
  "action": {},
  "permissions": [
    "activeTab",
    "scripting"
  ]
}