diff -up webkitgtk-2.14.1/Source/WebCore/platform/gtk/UserAgentGtk.cpp.orig webkitgtk-2.14.1/Source/WebCore/platform/gtk/UserAgentGtk.cpp
--- webkitgtk-2.14.1/Source/WebCore/platform/gtk/UserAgentGtk.cpp.orig	2016-10-12 07:59:25.670057792 +0200
+++ webkitgtk-2.14.1/Source/WebCore/platform/gtk/UserAgentGtk.cpp	2016-10-12 08:01:06.251878684 +0200
@@ -121,6 +121,10 @@ static String buildUserAgentString(const

     uaString.appendLiteral("; ");

+#ifdef USER_AGENT_GTK_DISTRIBUTOR_NAME
+    uaString.appendLiteral(USER_AGENT_GTK_DISTRIBUTOR_NAME "; ");
+#endif
+
     if (quirks.contains(UserAgentQuirks::NeedsMacintoshPlatform))
         uaString.appendLiteral("Intel Mac OS X 10_12");
     else