https seems to be required

[gorgonz]

in the commented block at the end of index.html jquery.min gets included. With ff 36.0 / linux it did not work to use the address without prefix "https:", so please add it.

Guess its not best place for the question, but since it might be an error too:

In the next line document.write addresses js/vendor/jquery-1.11.2.min.js, but there is nothing like that (?)