Are there any tools to aid in data migration from dev to staging to prod? If not, are there plans to build them?
I know you can Export JSON and Import JSON from Forg
Firebase is working on a new service "S3 Customer Backups" that will copy a .gz compressed backup of your entire firebase nightly into an s3 bucket you give them. I'm evaluating the beta of this service right now, but if it is something you need, I recommend asking support about it.
Our firebase got too large for the curl operation to complete, and this new solution will enable us to manage our dev environments. So if you have a large firebase, setup the S3 Customer Backups then use firebase-import to shove the data into your dev/staging firebases. Victory!