Ripple coin (XRP) notify

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 2,
  "name": "Ripple coin (XRP) notify",
  "description": "This extension will help you to track the ripple (XRP) price and notify whenever you want.",
  "version": "1.1.1",
  "icons": {
    "16": "/assets/icon16.png",
    "64": "/assets/icon64.png",
    "128": "/assets/icon128.png"
  },
  "web_accessible_resources": [
    "/assets/positive-sound.mp3",
    "/assets/icon-notification.png",
    "/assets/uparrow.png",
    "/assets/downarrow.png"
  ],
  "browser_action": {
    "default_icon": "/assets/icon.png",
    "default_popup": "popup.html"
  },
  "background": {
    "scripts": [
      "eventPage.js"
    ],
    "persistent": true
  },
  "permissions": [
    "storage",
    "notifications"
  ]
}