Youtube on Spotify

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "Youtube on Spotify",
  "version": "2.2",
  "description": "Enjoy saving your current Youtube video song into your Spotify library with a single click, watch and read its lyrics too",
  "manifest_version": 2,
  "browser_action": {
    "default_popup": "index.html"
  },
  "content_security_policy": "script-src 'self' https://www.google-analytics.com; object-src 'self'",
  "permissions": [
    "activeTab",
    "https://spotify-on-youtube.herokuapp.com/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://www.youtube.com/*"
      ],
      "js": [
        "app/main.js"
      ]
    }
  ],
  "icons": {
    "16": "/app/assets/16icon.png",
    "32": "/app/assets/32icon.png",
    "48": "/app/assets/48icon.png",
    "128": "/app/assets/128icon.png"
  }
}