Calculator

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "Calculator",
  "description": "A scientific calculator",
  "version": "4.9.4",
  "icons": {
    "16": "icons/icon16.png",
    "32": "icons/icon32.png",
    "64": "icons/icon64.png",
    "128": "icons/icon128.png"
  },
  "action": {
    "default_title": "Calculator",
    "default_popup": "popup/index.html"
  },
  "background": {
    "service_worker": "background/update.mjs",
    "type": "module"
  },
  "permissions": [
    "storage"
  ],
  "offline_enabled": true,
  "minimum_chrome_version": "88",
  "manifest_version": 3
}