Hi @James. I haven’t gotten into source map dev yet, only very briefly looked at it.
But .map files are supported and should load. Although you are right that .scss files are not supported.
And as a possible solution/workaround, isn’t there an option where you can instead embed all the source mapping into the processed .css file and devtools can read it from there?
I’m not sure how you set this up but it seems the Foundation setup I use does this.
Here’s a screenshot of one site in development which seems to have embedded sorcemap and devtools generates a ‘virtual’ directory of .scss files (I guess that’s the orange folder and purple file icons?):
