it appear to be these glitch, I have tested with the firefox addon
https://addons.mozilla.org/en-US/firefox/addon/953
then add your custome referrer and that will display hacked stuffs .. nothing really critical but to patch
Btw I have tested to input <script>alert('');</script> as a referrer and I get strange bugs, you may check the issue quickly redtyger, looks much critical than expected, I will disable mine so.
useful to say:
DO NOT INSTALL v1.61 IT HAS A SECURITY ISSUE!