My colleague John Coady provided the solution, which is to use a URL in the form "/nbextensions/data/b.tff", where the initial slash is crucial.
-- You received this message because you are subscribed to the Google Groups "Project Jupyter" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/jupyter/9221a4f7-9877-4b94-be90-e924b6544105%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
