I'm not sure if you're trying to be antagonistic with this reply or not. I also didn't feel it was important for me to outline the entirety of the data pipeline -- I merely wanted to point out that FTP is still in heavy use in some industries.

To address your concerns though: meter data is not ingested via FTP. That's done using other protocols. It's transferred b2b via FTP over private tunnels. And you're correct Firefox is not used for uploading data. If it were possible it wouldn't even be a good choice given the volume of data we deal with. It is, however, used heavily for accessing the uploaded data by Operations and other teams.