Quack, Thanks for this check. As for the URL changes, maybe we could try playing with the :index_file setting. Also my console confirms the deal with the theme is a total failure, but I think I can fix this. I created a new branch based on the last commit of the middleman4 branch (yes, chained branch… again) and was able to remove many embedded libraries. I tested the features as much as possible to my knowlege and had no problem. Btw, where does 'noconsole.js.coffee' comes from? It does not seem to be a real library. It's just some kind of snippet and no origin information. Should it be moved to lib/? Regards.