calculator simple and easy

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "calculator simple and easy",
  "description": "Sticky Calculator",
  "version": "0.8",
  "browser_action": {
    "default_icon": "128calculator-icon.png",
    "default_popup": "calculator.html"
  },
  "author": "Merbin Joe",
  "offline_enabled": true,
  "homepage_url": "http://www.allinworld99.blogspot.com",
  "icons": {
    "16": "16calculator-icon.png",
    "48": "48calculator-icon.png",
    "128": "128calculator-icon.png"
  },
  "content_security_policy": "script-src 'self' 'unsafe-eval'; object-src 'self'",
  "manifest_version": 2
}