Zap - Desktop Notifications

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 2,
  "name": "Zap - Desktop Notifications",
  "description": "Mirror Android notifications",
  "version": "1.0.1",
  "browser_action": {
    "default_icon": {
      "19": "assets/img/icon19.png",
      "38": "assets/img/icon38.png"
    },
    "default_popup": "popup.html"
  },
  "icons": {
    "16": "assets/img/icon16.png",
    "48": "assets/img/icon48.png",
    "128": "assets/img/icon128.png"
  },
  "content_security_policy": "script-src 'self' https://cdn.firebase.com https://*.firebaseio.com; object-src 'self'",
  "permissions": [
    "notifications"
  ],
  "background": {
    "page": "background.html",
    "persistent": true
  },
  "web_accessible_resources": [
    "/assets/img/icon48.png"
  ]
}