Add to Spotify

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 2,
  "name": "Add to Spotify",
  "description": "Add youtube music to spotify",
  "version": "1.4.8",
  "author": "Samuel Monteiro",
  "content_security_policy": "script-src 'self' https://www.youtube.com/* https://accounts.spotify.com/* https://api.spotify.com/*; object-src 'self'",
  "icons": {
    "16": "icons/spotify_32.png",
    "48": "icons/spotify_48.png",
    "128": "icons/spotify_128.png"
  },
  "browser_action": {
    "default_title": "Add to Spotify",
    "default_popup": "./index.html"
  },
  "background": {
    "scripts": [
      "./background.js"
    ],
    "persistent": false
  },
  "content_scripts": [
    {
      "js": [
        "./content.js"
      ],
      "matches": [
        "https://www.youtube.com/*"
      ],
      "run_at": "document_idle"
    }
  ],
  "permissions": [
    "identity",
    "storage",
    "activeTab",
    "declarativeContent",
    "https://accounts.spotify.com/authorize"
  ]
}