Hey @WiliamRosa! 

Databricks has actually confirmed that we can embed in an iframe running on localhost and that it's just a matter of getting the right settings. We're working on that with them now (I'm not the direct contact with Databricks on my team so there's a lot of back and forth at the moment).

I'm curious about the tunnel thing though. If I'm understanding it right, I'd have to have an app running on my dev machine that would expose my localhost to the internet. That would used some kind fixed domain? Would there just be one domain exposed? Asking because how would this work if say 5 devs want to work on this from different machines.

Cheers,

Sylvain