Calculator

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 2,
  "minimum_chrome_version": "35",
  "name": "Calculator",
  "version": "4.5.5",
  "author": "Aidan Taylor",
  "description": "Calculator for Chrome!",
  "icons": {
    "16": "icon-16.ico",
    "64": "icon-64.ico",
    "128": "icon-128.ico"
  },
  "offline_enabled": true,
  "permissions": [
    "storage",
    "clipboardRead",
    "clipboardWrite",
    "contextMenus"
  ],
  "app": {
    "background": {
      "scripts": [
        "js/jquery-2.1.3.min.js",
        "js/background.min.js"
      ]
    }
  }
}