NoScript 10.x (FF 57): Close button unprintable

[LigH]

I use NoScript v10.x in Firefox 57 "Quantum" on different PCs. On one of them, NoScript cannot display the "Close" button of its own button popup, instead I see a placeholder of the Unicode character (square with hex code).

I suspect that NoScript blocked the cloud server used to download font files from, based on a blacklist from earlier versions. How do I discover which server is used for this font?

[Pansa]

This was fixed for me in 10.1.3c3
It used a font that wasn't standard.
Now it's a nice X

[LigH]

Not impossible that one of the PCs did not yet get the last update, I will look there later...