diff -up webkitgtk-2.14.3/Source/WebCore/platform/gtk/UserAgentGtk.cpp.orig webkitgtk-2.14.3/Source/WebCore/platform/gtk/UserAgentGtk.cpp
--- webkitgtk-2.14.3/Source/WebCore/platform/gtk/UserAgentGtk.cpp.orig	2017-01-17 16:33:10.899640430 +0100
+++ webkitgtk-2.14.3/Source/WebCore/platform/gtk/UserAgentGtk.cpp	2017-01-17 16:32:26.930817219 +0100
@@ -125,6 +125,10 @@ 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 if (quirks.contains(UserAgentQuirks::NeedsLinuxDesktopPlatform))