Examine source code of NetEase Music Recognizer

{
  "applications": {
    "gecko": {
      "id": "{2fd4cc4f-dd94-4002-b98c-a8919a89831a}"
    }
  },
  "update_url": "",
  "description": "Music Recognizer using NetEaseMusic",
  "version": "1.1",
  "manifest_version": 2,
  "name": "NetEase Recognizer",
  "background": {
    "scripts": [
      "background.bundle.js"
    ]
  },
  "action": {
    "default_popup": "popup.html",
    "default_icon": "icon-34.png"
  },
  "permissions": [
    "tabCapture",
    "activeTab",
    "cookies",
    "storage"
  ],
  "content_security_policy": "sandbox allow-scripts allow-forms allow-popups allow-modals; script-src 'self' 'unsafe-eval'; child-src 'self'",
  "chrome_url_overrides": {},
  "icons": {
    "128": "icon-128.png"
  },
  "host_permissions": [
    "https://music.163.com/",
    "https://interface.music.163.com/",
    "http://clientlog.music.163.com/"
  ],
  "web_accessible_resources": [
    "icon-128.png",
    "icon-34.png"
  ],
  "default_locale": "en",
  "commands": {
    "_execute_action": {
      "suggested_key": {
        "windows": "Alt+Shift+E",
        "mac": "Alt+Shift+E",
        "chromeos": "Alt+Shift+E",
        "linux": "Alt+Shift+E"
      }
    }
  }
}