Currency Thingamajig

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "background": {
    "scripts": [
      "scripts/background.js"
    ]
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_title": "Currency Thingamajig",
    "default_icon": {
      "16": "images/16x16.png",
      "32": "images/32x32.png",
      "48": "images/48x48.png",
      "128": "images/128x128.png"
    }
  },
  "name": "Currency Thingamajig",
  "version": "0.21",
  "description": "Very simple currency exchange converter extension thingamajig for Chrome",
  "permissions": [
    "storage",
    "https://www.ecb.europa.eu/"
  ],
  "icons": {
    "16": "images/16x16.png",
    "32": "images/32x32.png",
    "48": "images/48x48.png",
    "128": "images/128x128.png"
  },
  "content_security_policy": "script-src 'self' https://ssl.google-analytics.com; object-src 'self'",
  "minimum_chrome_version": "30",
  "manifest_version": 2
}