Calculator

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "browser_action": {
    "default_icon": "calculator-icon1/48x48.png",
    "default_popup": "popup.html",
    "default_title": "Calculator"
  },
  "content_security_policy": "script-src 'self' 'unsafe-eval' https://ssl.google-analytics.com; object-src 'self'",
  "description": "Basic arithmetic calculator",
  "icons": {
    "16": "calculator-icon1/16x16.png",
    "24": "calculator-icon1/24x24.png",
    "32": "calculator-icon1/32x32.png",
    "48": "calculator-icon1/48x48.png",
    "64": "calculator-icon1/64x64.png",
    "128": "calculator-icon1/128x128.png"
  },
  "manifest_version": 2,
  "name": "Calculator",
  "offline_enabled": true,
  "permissions": [
    "clipboardRead",
    "clipboardWrite"
  ],
  "version": "1.0"
}