UserAgent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.108 Safari/537.36

Steps to reproduce the problem:
1. set custom margins
2. restart chrome
3. set custom margins

What is the expected behavior?
if a custom margin is set it should persist

What went wrong?
custom margins are no longer saved between chrome sessions.  they have to be adjusted every time.

Did this work before? Yes 

Chrome version: 63.0.3239.108  Channel: stable
OS Version: 10.0
Flash Version: Shockwave Flash 28.0 r0