lithium\analysis\logger\adapter\FirePhp::$_headers
These headers are specified by FirePHP and get added as headers to the response.
Source
protected $_headers = [
'X-Wf-Protocol-1' => 'http://meta.wildfirehq.org/Protocol/JsonStream/0.2',
'X-Wf-1-Plugin-1' => 'http://meta.firephp.org/Wildfire/Plugin/FirePHP/Library-FirePHPCore/0.3',
'X-Wf-1-Structure-1' => 'http://meta.firephp.org/Wildfire/Structure/FirePHP/FirebugConsole/0.1'
];