Identify FirePHP by the X-FirePHP-Version header

src/Monolog/Handler/FirePHPHandler.php

@@ -154,6 +154,8 @@ class FirePHPHandler extends AbstractProcessingHandler
      */
     protected function headersAccepted()
     {
-        return !isset($_SERVER['HTTP_USER_AGENT']) || preg_match('{\bFirePHP/\d+\.\d+\b}', $_SERVER['HTTP_USER_AGENT']);
+        return !isset($_SERVER['HTTP_USER_AGENT'])
+               || preg_match('{\bFirePHP/\d+\.\d+\b}', $_SERVER['HTTP_USER_AGENT'])
+               || isset($_SERVER['HTTP_X_FIREPHP_VERSION']);
     }
 }