Firefox 63.0.3Windows 8.11.5.0You must refresh the entire page to the changes. Is this by design now?
Hi @zmni!
I just tested this in FF Nightly (65.0a1) and I'm not seeing this issue.
Please describe the steps needed to reproduce the error being mentioned. Also, is "Live preview" option checked? What happens after saving the changes?
I encountered something similar recently, but I discovered I had opened two editors open modifying the same style. Live preview was enabled on both, so one editor would override changes.
I see this also on FF 63. Changing the "Number of applies-to items" updates automatically in the manager with 1.4.23 and needs a page refresh with 1.5.0.

Ah okay, this is actually related to #590.
Please try v1.5.1 and report if the problem persists.