Simple Calculator

Very sophisticate but simple calculator for elementary math operations.

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manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 3,
  "name": "Simple Calculator",
  "version": "1.0",
  "action": {
    "default_popup": "calculator.html"
  },
  "icons": {
    "48": "icon.png",
    "128": "icon.png"
  },
  "content_security_policy": {
    "extension_pages": "script-src 'self'; object-src 'self'"
  }
}