manifest.json

{
  "manifest_version": 2,
  "name": "YouNote",
  "version": "0.1",
  "background": {
    "scripts": ["background.js"],
    "persistent": false
  },
  "content_scripts": 
  [
    {
      "matches":
         [
          "https://www.youtube.com/*",
          "https://youtube.com/*"
         ],
      "js": ["jquery-3.4.1.min.js", "quill.js","content.js"]
    }
  ],

  "permissions": 
  [
    "storage",
    "tabs",
    "activeTab",
    "declarativeContent"
  ],


  "commands": {
    "take_notes":
    {
      "suggested_key":
       {
        "default": "Ctrl+Y"
        },

      "description": "Take down notes"
    }
  },

  "page_action": {
    "default_icon": "ynt.png"
  }
}