Making Javascript Source Maps work

[zeeg]

While I’m not 100% sure, it’s possible this is related to another issue reported on the forums:

Private Source Maps Not Working

Thanks! Will dig more, and update this (as well as the ticket) once we sort it out. It does appear as if something is wrong on our end in this situation, as at first glance everything is what I’d expect it to be.

Improve source scrape debugability