Modern Calculator

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 2,
  "name": "Modern Calculator",
  "options_page": "settings.html",
  "description": "Simple and Modern Calculator for Chrome browser.",
  "version": "0.2",
  "permissions": [
    "storage"
  ],
  "icons": {
    "19": "img/19.png",
    "38": "img/38.png",
    "48": "img/48.png",
    "128": "img/128.png"
  },
  "browser_action": {
    "default_icon": "img/48.png",
    "default_title": "Open Calculator!",
    "default_popup": "popup.html"
  },
  "content_security_policy": "script-src 'self' 'unsafe-eval'; object-src 'self'"
}