I've now tested it on Windows 10 with Firefox 61.0.2 and it works fine for me. May be related to graphic drivers and the shadow functions I added yesterday. Can you take a look into the developer console (F12) and tell me if there is any error text being shown? Thanks!
I just got home and tested it and it works fines now. Did you make any changes after I notified you today or was it only require a reboot of my PC on my end? Anyhow, thanks for your attention to this minor annoyance. Keep up the awesome work, and take care of that foot.
Yes, I made a few small changes but I didn't find any related problem in my code, was just playing around with the shadow effects... But I'm glad to hear that it now works on your end :)
Thanks for your help. Your attention and care to your product is unparalleled. I am very impressed.