Youtube on Spotify

{
    "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": {
        "128": "\/app\/assets\/128icon.png",
        "48": "\/app\/assets\/48icon.png",
        "32": "\/app\/assets\/32icon.png",
        "16": "\/app\/assets\/16icon.png"
    }
}