UserAgent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:58.0) Gecko/20100101 Firefox/58.0

Example URL:
any ftp server

Steps to reproduce the problem:
1. Press f12, set network speed to something slow
2. Download file via ftp://ip/file.iso
3. While downloading you noticed that your Network Throttling value is ignored

What is the expected behavior?
Network Throttling profile should be active

What went wrong?
Network Throttling value should be applied

Did this work before? No 

Chrome version: 63.0.3239.132  Channel: stable
OS Version: 7
Flash Version: