Examine source code of Youtube comments sidebar

{
  "manifest_version": 3,
  "name": "Comments Sidebar for YouTube",
  "version": "1.0.2",
  "browser_specific_settings": {
    "gecko": {
      "id": "comments-sidebar@devpalwar.me",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "key": "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA1JCmn278/eg8uM6w2ku63/NzekE6ujFCXoLRIMFjzRTHIp3cSQFIB6Vm0iMi3CND72H4W1RpaKYKzAc+brcq3yfnwPe29zf7PAVbXnOYecVtGb89tqvQ5+G3w1N8oaPcPUHBPxWPZEuot1qv59THlPHCWt/vWR4I9uuPCr5K+fxOLssu6xu29yVWu7Y0XxXAQv1IX+u/PH18qtigDLdrYh182Jb7y97jiogdamObXB2o+iGoSHXUPIRNa8yNTtzYhGuuyt7qrqfoQfFTAug6itDNA8zdeeWL5jEGvlFD9XeqCwrfdG30iZF3w5Xc97ry5+myu7YC1J6OOnthTwrJfQIDAQAB",
  "description": "Displays YouTube comments in a custom sidebar next to the video",
  "permissions": [
    "activeTab"
  ],
  "host_permissions": [
    "https://www.youtube.com/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://www.youtube.com/*"
      ],
      "js": [
        "content.js"
      ],
      "css": [
        "styles.css"
      ],
      "run_at": "document_end"
    }
  ],
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "content_security_policy": {
    "extension_pages": "script-src 'self'; object-src 'self'; connect-src *"
  }
}