It's local. The webRequest API provides an 'ip' field with each request, and the hostname can be extracted from the URL. Once you have an IP address, just check

It's local. The webRequest API provides an 'ip' field with each request, and the hostname can be extracted from the URL. Once you have an IP address, just check for colons. https://developer.chrome.com/docs/extensions/reference/api/webRequest https://developer.chrome.com/docs/extensions/reference/api/w...