WannaBrowser is a tool for testing HTTP User Agent Spoofing, helpful in testing your Apache mod_rewrite rules which are useful for presenting custom content to particular types of browsers.
Check your web browser HTTP User Agent instantly, along with the full header, Forwarded IP (for proxy service), HTTP Referer, HTTP_X_FORWARDED_FOR and more!
A user agent is the client application used with a particular network protocol; the phrase is most commonly used in reference to those which access the World Wide Web.