xruntime is the simple extension to show all HTTP response headers.
Useful to determine the technology (e.g. Ruby on Rails, ASP.NET, PHP, JBoss) supporting the web application.
Common standard headers are
Server,
Content-Encoding,
Content-Type,
Content-Length,
Expires,
Cache-control
etc
Common non-standard response headers are
X-Powered-By,
X-Version,
X-Runtime,
X-Version,
X-Cache,
X-AspNet-Version,
X-XSS-Protection,
X-Content-Security-Policy
and many others
谷歌浏览器、其他Chromium内核的浏览器